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Published: February 10, 2024

Waterpik Sonic-Fusion Flossing Toothbrush 2.0 review

Author: Jon Love (Leave a comment)
Waterpik Sonic-Fusion Flossing Toothbrush 2.0 review 1

Our verdict


The original Sonic-Fusion wasn’t great.  The battery life of the toothbrush was poor, the noise it made was irritating and it was a bit expensive.

I can thankfully say that the noise has been addressed. The battery life is a bit better, but not as good as is claimed.

Like the original, although I like the concept, I do think you are better off buying a separate electric toothbrush and water flosser.

You can get similar if not more benefits for less money.

Waterpik Sonic-Fusion 2.0 Professional
Waterpik Sonic-Fusion 2.0 Professional




Toothbrush and water flosser combined


Combines two products into one – conceptually great, poor execution


Stylish design


Not suitable for all – only 1 style tip


Timer and pacer encourage brushing for the recommended time


Toothbrush battery life is poor


Choose between 10 different pressure settings


The water flosser is not portable


American Dental Association (ADA) approved


3 year warranty

Consider these other water flossers

There is no direct alternative to the Sonic-Fusion 2.0 flossing toothbrush, it really is one of a kind.

One of the closest alternatives is the Waterpik Complete Care 9.5 (view on Amazon) which is a separate brush and water flosser that share the same base unit. 

My preference is for a completely separate electric toothbrush and water flosser.

Waterpik doesn't offer toothbrushes, without a water flosser, but they do make the best water flossers on the market.  The Aquarius (WP-660) from Waterpik is my top choice.

I would then pair this with the Oral-B Smart 1500 toothbrush.

2 separate devices will take up more countertop space, but will give you more benefits and will work out cheaper too.

Our Choice
Oral-B Smart 1500
Oral-B Smart 1500
Our Choice
Waterpik Aquarius
Waterpik Aquarius
Our Choice
Waterpik Sonic-Fusion 2.0 Professional
Waterpik Sonic-Fusion 2.0 Professional
Electric Teeth Rating
Amazon $73.19 $79.5 $174.99
Oral B $79.99 - -
Walmart - $100.61 $225.81

What is the Waterpik Sonic-Fusion 2.0?

I want to make clear what this product is and how it differs.  This is because it is unlike something most have seen before.

The Sonic-Fusion 2.0 is the 2nd generation of a flossing toothbrush from Waterpik.

It is a toothbrush and water flosser blended into 1 product.

It is designed to be a more convenient and practical option for you to help take care of your teeth and gums.

The toothbrush looks like most other electric brushes you see on the market today.

The big difference is that the handle and brush head also double up as the handle and nozzle for the water flosser.  Water is ejected through the brush head, rather than a more typical nozzle of a water flosser.

This review will go into lots of detail, but the following promotional video gives a good overview of the product and how it stands out.

Design, usability, clean & general use

Many of us buy our oral care products online nowadays, but it is safe to say the box for the Sonic-Fusion 2.0 grabs your attention.

Firstly it is really quite big and the use of a bold orange color really works.

What I do like is that there is quite a bit of information on the box to explain what the product is, so you can make a bit more of an informed purchasing decision even if you had never come across this before.

The exact box content will depend on the variant you have opted for.  The different variants I have listed above.

Waterpik Sonic-Fusion 2 retail box

I have the standard SF-03 Sonic-Fusion 2.0 in black, although you can get it in white too.

Overall it is a smart and fairly compact unit that sits nicely on most bathroom countertops.  If space is at a premium then this might not be ideal, but I don’t think they could have made the footprint much smaller.

I like the chrome accents on the unit. They give it a more premium look, even if it is just painted plastic.  The whole unit is primarily of plastic construction.

This shouldn’t be an issue for most, but because it requires mains power to function, you need to be in range of a power outlet.  The lead is approx 4ft in length.

The Sonic-Fusion 2.0 is essentially made up of two main parts, albeit they are integrated too.  You have the water flosser and then the toothbrush. 

The basic design of the Sonic-Fusion 2.0 is similar to most of other Waterpik’s countertop water flossers.  You have a base station which has all the electronics inside and then a water tank/reservoir that sits on top.

Where you would normally have a handle connected to the unit via a hose, in this instance you have an electric toothbrush.

The SF-03 has a slightly different design to the Professional SF-04.  

Both have a rounded esq shape to them, but the SF-03 I have here is a little more rounded.  There are no harsh edges and the reservoir and base unit has a rounded rectangle, almost oval shape to it.  You are best off looking at the hands on images to see what I mean.

Waterpik Sonic-Fusion 2.0 SF-03 - Black

At the top sits the reservoir that has a 16 ounce (473ml) capacity.  

The tank itself is transparent, with a completely removable lid. Alternatively you can leave the lid attached and one half of the lid opens to easily fill the tank.

On the base of the tank is a sprung loaded plug that fits into a hole on the main base station and lets the water flow into the pump below.

The reservoir is easily removed and replaced onto the base station.  This makes it easy to fill the unit.

The whole unit is actually marginally thinner at this point, giving a slightly tapered look to the Sonic-Fusion.  

Sealed inside the unit is the pump and all the technology needed to make this unit function.

The front of the base station is extended out to provide a platform onto which the toothbrush sits.

The removable brush when placed here clips into the detachable hose.  

It is this hose that feeds the water from the main unit into the toothbrush handle.

WIth a length of about 3 feet you have a reasonable stretch from the base unit.  Therefore at full stretch, you can be about 7 feet away from the power socket.

Waterpik Sonic-Fusion Flossing Toothbrush 2.0 review 2

The hose tucks neatly away into the front of the unit for convenient storage.  There is a slight recess in the body of the water flosser to allow the hose to tuck away.  

The right side of the Sonic-Fusion flosser is free of buttons or controls. On the left side is a large rotatable dial, this controls the pressure of the water.

You have the choice of 10 different settings ranging from 10 to 100PSI and this can be controlled before or during the use of the Sonic-Fusion.  The pressure control knob is easy to rotate and there is a marker to make it clear which setting you have chosen.

It is powerful and most will settle around 6, 7 or 8 in my opinion, a balance between comfort and flossing power.

The base of the Sonic-Fusion has 4 rubber feet to keep it securely in place on a countertop, along with some regulatory information.

Extending from the back of the unit is the power cable.

At the end of the 4ft power cord is a 2 pin US power adapter that supports 100-240v.

Taking a look at the toothbrush in a bit more detail, you will see that it sits centrally on the base unit.  It has a recess in this base unit so that the brush sits more securely and won’t fall over.

When in this position, provided mains power is connected, the toothbrush will recharge the internal battery.

The toothbrush is an electric toothbrush, which can function independently of the water flosser.

With a conventional water flosser there is a handle with a nozzle at the top, in this instance, the toothbrush is the handle and the nozzle is the brush head.

The toothbrush handle has to connect to the water flosser via the hose that clips into the base of the handle. 

The hose actually sits proud of the base of the toothbrush handle.  The attachment is designed in such a way that the hose rotates a full 360 degrees, so as not to limit your control and movement of the handle when flossing.  That said, the nature of having a hose attached does cause a slight resistance when handling the brush.

Detachable hose Waterpik Sonic-Fusion 2.0

The hose clips in securely and is unclipped by pressing a large circular button located on the back of the brush handle.

If you have ever used an electric toothbrush before you will notice that the handle is slightly chunkier than a Sonicare or Oral-B brush.  For some this is a positive, for others, the larger in hand feel isn’t as comfortable.

The design of the handle is fine, but it doesn’t feel quite as refined as the likes of Sonicare.  It is also a little heavier.

There are no rubber grips like you see on some brushes nor textured surfaces on the rear of the handle.  It is really quite smooth to the touch.   The older model did have a textured surface on the back of the handle.

The brush and floss button both stand fractionally proud of the main body and the floss button does have 4 raised dots which help detect and hold the brush a little.

The front of the handle has a long oval shaped panel, within which sits the main controls and LEDs for the toothbrush.

The top button is the ‘Brush’ button and underneath this sits the ‘Floss’ button.  Both of these have a silver border around them to make them stand out.  They do too have an LED above them to signal they are being used.

Below these is a much smaller ‘speed’ button which allows you to select between the 2 different power settings of this toothbrush.

2 LED’s underneath are used to signal which power setting is selected. 2 LEDs lit means the highest power setting has been chosen, while only 1 LED will be lit when the lower power mode is selected.  

The power/speed can only be changed once the brush has been turned on. It will default to the last speed setting used.  You don’t have to change it each time you use the brush, unless you specifically want to change the speed.

Sonic-Fusion 2.0 toothbrush in hand

All the buttons are slightly concave helping the fingertips naturally fall and rest in place.

With the SF-04 Professional, rather than LEDs above the brush and floss button, the light is emitted around the side.  This is something that differentiates the professional model slightly.

On the lower part of the panel is a battery icon, with 3 LED’s stacked below it.  Each LED shines white light and indicates the battery charge.  

Roughly speaking each LED represents 33% battery power remaining.  If all three are lit then there is plenty of power.  Just the one lit, then a charge will be required soon.

Underneath this is the Waterpik logo.

All wording on the handle is silver in color, matching in with the theme.

At the top of the handle is where the brush head attaches.

A metal tube feeds out from the motor inside the brush handle.

Unlike other brushes, this tube has a small hole in it, through which the water comes if being used as a flosser.

With the SF-03 variant, you get 1 x compact brush head included in the box.  It simply pushes onto and pulls off of the handle. The SF-04 comes with 2, 1 x compact and 1 x full size.

When you want to remove the head, you simply pull it off.

The actual brush head is shaped similar to that you might see on a Philips Sonicare brush.  It is not a circular brush head like you get with Oral-B electric toothbrushes.

Like any head it is made up of a whole number of bristle clusters. The compact head has 16 bristle clusters whilst the full size has 26.  The bristles are not all the same length, you have a few clusters that are taller in order to try and achieve the best clean possible.

Towards the tip of the brush head, just below the upper bristle clusters is a small tube that acts as the nozzle for the water flow, it is the blue bit within the bristles.

Waterpik Sonic-Fusion Flossing Toothbrush 2.0 review 3

The bristles feel a little firmer to the touch than you might expect but they are actually quite soft on the teeth and gums.  There is quite a lot of flex in them.

It is worth knowing that at the bottom of the brush head is a small plastic ring.  It is black in color on this model, although they come in white or silver.  This is actually removable.  These colored rings are designed to make it clear whose head is whose.

Imagine a husband and wife sharing the brush handle, they each have their own brush head.  The husband may have the black ringed brush head, whilst the wife has the silver color.

There is no place on the base unit to store additional brush heads with the SF-03 variant.  With the Professional, you get a removable magnetic attachment that adheres to the base unit and gives a place to store 1 brush head upright. 

If you have the SF-03, you could potentially use the included travel case.  More on this shortly.

Unlike Oral-B and Sonicare who offer a vast array of different styled brush heads, Waterpik offers just the one, albeit in a standard and compact size.

You don’t really need lots of different styled brush heads.  Generally, more benefit is going to be gained from your brushing time and technique than the head itself.

The heads should be replaced every three months.  Unlike some brush heads that have fading bristles or icons that light up on the handle, there are no reminder systems built into the brush, so it is up to you to replace it regularly.

Replacement heads come in packs of 2 and cost $25.

Sealed inside the brush handle are the motor and battery.

The handle/toothbrush is water resistant and is fine to be rinsed under the tap.  You can even use it in the shower if you really desire.  Just avoid submerging it completely.

It is a rechargeable Lithium-Ion battery inside the handle that offers 2 weeks of use on a full charge according to Watepik.

This flossing toothbrush offers 3 cleaning modes.

These are not the clean, sensitive, massage, whitening and deep clean style modes you might see on other electric toothbrushes.

In this instance this flossing toothbrush offers:

  • Brush
  • Floss
  • Brush and floss

You control each mode by a single press on the relevant button.

Press the brush button once to turn it on and press it again to turn it off.

Press the floss button once and the water will begin flowing out the brush head, press it again to stop it.

To brush and floss, first press the brush button, followed by the floss button. 

Although you press a physical button on the handle, it is worth knowing that the handle communicates wirelessly back to the main unit to enable and disable the water flow.

The actual clean offered by the toothbrush is very good.  In my tests it did a great job of cleaning away the plaque, even along the gumline and in between the teeth.  Better than I expected to be honest.  And these results were from brushing alone, no use of the water flosser.

But, the actual cleaning experience doesn’t feel quite as thorough as what you get from Sonicare or Oral-B electric brushes.  I am not sure if I can really explain why, just a psychological feeling.  The actual plaque disclosing tests I completed were certainly comparable to these leading brands. I think it is the brush head itself.  It is doing a good job of the cleaning, but the cut of the bristles just offers a different brushing sensation that feels less invigorating. 

Like a Philips Sonicare toothbrush, this actually offers up to 31,000 brush strokes per minute.  

Waterpik Sonic-Fusion Flossing Toothbrush 2.0 review 4

Waterpik hasn’t been explicit in how the lower of the 2 speeds options on this brush differs from the full/higher speed option.  I can say it did feel less intense and powerful.  It felt like the power dropped by about a third.

What I particularly welcome with this newer 2.0 model is the noise it makes.  

It is by no means quiet, but the sound is more like a regular sonic electric toothbrush.  This is unlike the first generation which had a very irritating whining sound.

Like any good electric toothbrush this has a timer and pacer built-in.  They are very important and help encourage you and me to brush evenly and for the right amount of time.

Once powered on in the brushing mode, the built-in timer is activated.  At 30 second intervals, there is a slight pause in the brush head motion, which also causes a change in sound.  This is your alert to move from one quadrant of the mouth to another.

Once you have cleaned the upper right, upper left, lower right and lower left quadrants for 30 seconds each, the 2 minutes has elapsed and the brush will automatically turn itself off. 

This feature is disabled when flossing.  The unit will continue to pump from the moment it is switched on until it is turned off.

Not present in the Sonic-Fusion 2.0 is a pressure sensor.  It is a shame it does not have such.  This is much more common now in other electric toothbrushes like the Sonicare 4100 Series and the Oral-B Smart 1500.  

In those brushes with a pressure sensor built-in, it will alert you, usually via a change in sound or some sort of visual alert if you are applying too much force when brushing.  

Bristles need essentially only skim the surface of the teeth, you don’t need to scrub.

With this Sonic-Fusion, you will hear the brush staining a little if you brush with too much pressure but there is no actual pressure sensor built in to offer any other form of alert.

Despite having used the first generation of the Fusion, and Waterpiks toothbrush heads for their standalone water flossers, I still find it a bit strange using a toothbrush as the tool to floss your teeth.

Maybe it is because I am used to the smaller handles and slimmer nozzles found on most other water flossers, but using a toothbrush handle is a bit more clunky in a way.

Yes, I could use this daily, but it still doesn’t feel optimum.

You are not able to control the water jet in quite the same way as you can with a regular water flosser. For me, the brush head restricts the accuracy you have with the smaller nozzles on classic water flossers.  

Even when you are using the flossing mode only, you kind of feel like you are brushing your teeth because the bristles inevitably make contact.  Maybe this is a good thing, I am not so sure.

You can use the sonic toothbrush and the water flosser at the same time rather than independently.

A clever concept that kills two birds with one stone as they say.  I don’t dislike it, but it takes a bit of getting used to.

My testing was not to the standards of clinical trials, but you generally hold a toothbrush head at 45 degrees to the gumline, whilst with a water flosser this is at 90 degrees.  The manual suggests you use the 45 degree angle.

I am sure overall it helps get a good clean.  My teeth feel cleaner in this mode than brushing alone.  The water being fired in at the same time certainly gave the sensation that it was doing a better job.

This combined brush and floss mode would work well if you are in a bit of a rush and have limited time to clean the teeth.

It also works well for the self-confessed lazy flossers, who would simply skip the exercise otherwise. I have to give credit to Waterpik here.  

Many people don’t brush for long enough, let alone clean interdental spaces, so if you can do both at the same time with some effectiveness, then wonderful.

And it has proven to be effective in the testing Waterpik has conducted.

But a point I want to raise is the sequence for brushing and flossing.

In Waterpiks demonstration videos, they suggest using the brush and then flossing.

However, assuming you brush with a fluoride based toothpaste, flossing with water afterwards will wash away much of, if not all of the protective layer left behind by the paste.

Therefore flossing first, then brushing is likely the better option.

The Sonic-Fusion 2.0, like the original, can work for the average user, with no overly complicated dental history. But, for those with more advanced oral care needs or conditions are likely better served by other products.

For example someone with periodontal pockets will not be able to get the same deep cleaning as they can with a conventional water flosser with specialized tips. 

Interdental brushes and string floss are still considered the best options for cleaning between the teeth by many professionals.

Pressure dial - Waterpik Sonic-Fusion 2.0

The pressure setting used (controlled via the rotating dial on the left) does dictate how much flossing time you get.

Waterpik claims 60+ seconds of flossing time, but I think they are selling themselves a little short here.

Set to pressure setting 10, from a full tank I achieved 1 minute and 6 seconds of flossing.  That is 66 seconds in total. But few would ever want to use the 10 pressure setting, that is quite intense.

When dropped down to the lowest setting, I achieved around 4 minutes and 40 seconds, that is 280 seconds in total.

Of course, you need to find what works for you, but you can more than likely get 2 flossing sessions from a full tank of water.

It is possible to use mouthwash in the flosser if you want or prefer.  It is overkill and expensive to replace all water with mouthwash.  A dash or 2 of mouthwash in with the water often works well to give that extra freshness.

Giving extra credibility to the Sonic-Fusion is the fact that it is ADA accepted.

What does this mean?

Well, the American Dental Association (ADA) is one of the leading dental bodies within the USA and to earn their seal of acceptance, the product has to go through a series of tests and be scrutinized by many professionals.  

Essentially, this is a great accreditation to have and it can give you extra confidence that this is approved by dentists and will help you improve your oral health.

Included in the box is a travel case, a useful accessory.

The case holds the brush handle and up to 2 brush heads, as is common.

It is hinged on the left side and opens up like a book.  

Rather than being a solid color, the back half of the case is black plastic whilst the front is a transparent/clear plastic, so you can see the brush in the case.

Waterpik Sonic-Fusion 2.0 Travel Case

There are vents built in so that air can flow and reduce moisture and bacteria built up.

The clip on the right side locks reassuringly into place protecting the brush in transit from damage and accidental activation.

The edges are curved and the overall size is fractionally taller than the brush handle itself and about twice as wide.

This case is for the brush only and not the water flosser element.  Whilst you can move the water flosser itself, it is not travel friendly.

If going on vacation, the idea is you take the brush and leave the flosser at home.

And finally, Waterpik does offer a 36 month/3 year warranty as standard, should anything go wrong, which is excellent. 

The Sonic-Fusion is well built and looks good.  The cleaning results from the toothbrush are impressive.  Whilst the flossing and brushing combo performs ok, this second generation still hasn’t won me over.

I feel that a separate water flosser and electric toothbrush suit most people better.  This is because you have more choices.  You can gain extra features in the toothbrush and you can get a dedicated water flosser that better serves more specific oral care needs.  Not to mention it is a little easier to control and move around the mouth than this flossing toothbrush solution.

Summary of design, usability, clean & general use

The design varies slightly between SF-03 and SF-04
An overall compact unit that doesn’t look out of place
16 ounce (473ml) reservoir
10 pressure settings ranging from 10 to 100 PSI
Get 66-280 seconds of usage from the tank
Detachable hose to handle
Chunky brush handle
Individual buttons for flossing and brushing
2 speed settings available
3 modes (brush, floss, brush & floss)
Only 1 style of brush head (compact & full sized)
Good cleaning results but not the most intense cleaning sensation
Quieter & more pleasant sound than old model
Built in timer and pacer
Automatic power off
No pressure sensor
Travel case included
American Dental Association approved

Battery life

The vast majority of water flossers require mains power to function.  This Sonic-Fusion is no different. 

To use the flossing element of this flossing toothbrush you must be connected to power.

But, the toothbrush on its own can be used without being wired into the socket.

Built into the brush handle is a rechargeable Lithium-Ion (Li-Ion) battery.  

Waterpik claims it offers up to 56 minutes of use on a full charge.  That is equivalent to 2 weeks of use, twice a day for 2 minutes.

Unfortunately, in my testing, I achieve just 44 minutes of use on a full charge.  This is equivalent to 11 days of use.

This was when set to the higher of the 2 speeds.

To be fair to Waterpik I achieved a very impressive 114 minutes on the lower of the 2 speeds.  That is equivalent to 4 weeks' use. This is twice the claimed battery life.

But, whilst that does technically achieve the claimed battery life, all other brushes I have tested achieve the claimed battery life on their default/standard cleaning mode.  I don’t feel you should have to use the lower of the 2 speed options to achieve this battery life.

This is an improvement on the last generation, which offered just 7 days use on a single charge.  The original Sonic-Fusion had a Nickel Metal Hydride (NiMH) battery.

However, this isn’t good enough for a second generation and the price commanded of this product.  It should achieve 2 weeks on the highest speed setting.  Almost all other toothbrushes do.

You may well have a different opinion, but I personally believe any new electric toothbrush should be offering at least 2 weeks use on a single charge.  Whilst we don’t all need this much power it allows for us to go away on vacations etc without having to worry we will run out of battery power or need to take the charging stand with us.

The Fusion doesn’t do well in the battery department. Models like the Sonicare 4100 ProtectiveClean offer three times the battery life.

The battery is built into the handle and is not user replaceable.  It is advised to leave the brush on the unit for at least 4 hours to charge fully.  The charging time is quicker than most competing products.

On the handle are 3 indicator lights.  These indicate the level of battery charge for approximately 10 seconds after removal from the charging base and after use, and will then turn off. The 3 LEDs essentially represent 33% of the battery charge each. If only the bottom light is lit, then recharging is recommended to ensure uninterrupted use.

It would be good if it flashed red as this would likely catch the eye more and remind you it requires charging.  

When you are not using the handle, it can be left on the charging stand part of the base unit all the time.  Whether you have it connected to power or not is up to you.

You cannot use the water flosser or the brush if the battery power is really low or depleted.  There needs to be some charge in the brush handle even if you have the hose connected for flossing.

The Sonic-Fusion 2.0 has a 2 pin US power adapter hard wired into it.  The unit itself supports 100-240v.  This means if you travel with this you only need a plug adapter and not a voltage adapter.

Summary of battery life

Water flosser must be connected to mains power to function
Rechargeable Lithium-Ion (Li-Ion) battery built into toothbrush handle
Toothbrush can be used without being connected to mains power
Suggested to last 14 days (28 uses) on a full charge
Achieves 11 days when set to the highest speed setting
Achieves 28 days when set to lowest speed setting
Battery life is much better than original Sonic-Fusion
Battery life is satisfactory but competition does outperform
LEDs give an indication of battery charge
Red flashing LED would be useful when power is low
2 pin US power cord supplied
Unit supports 110-240v

Price & where to buy

I have included links to buying options here at the start of the review.

In the section below, I discuss the price more generally and in relation to similar products.

The retail price of the Sonic-Fusion 2.0 is $179.99 or $219.99 for the Professional variant.

Based on the retail price alone, I can’t say it is worth paying an extra $40 for the Professional.

However, it would appear that there is some discount on the retail prices.  Factoring this discount in, the more typical selling prices are in the region of $150 and $160 respectively.

Of course price is always subject to change and varies from one seller to another, but $10 is a much more reasonable price difference.  Plus, there is a decent saving on the retail prices.

At particular times of the year, there is the likelihood of even greater savings.  Data suggest that prices can be as low as $120 for the Sonic-Fusion 2.0.  

Of course, you do need to factor in the cost of replacement brush heads. Both the compact and full size heads are the same price.

Supplied as a pack of 2, the price is around $25. That is $12.50 each. That is pretty pricey when you consider an Oral-B head is about $5 and Sonicare is around $8-10.

Some justification for this is just how unique they are.

Waterpik Sonic-Fusion Flossing Toothbrush 2.0 review 5

Here at Electric Teeth, we like to work out the cost of ownership over a 3 year period.  It helps give a bit of a benchmark in comparison to other products.

The SF-03 comes with 1 brush head in the box, so over 3 years, you need a further 11 heads. 11 x $12.50 means an expense of $137.50 on top of the $150 purchase price.  

This makes the total ownership cost of the SF-03 as $287.50.

The Professional variant, SF-04 comes with 2 brush heads in the box (1 is compact and the other standard). 10 extra heads costs $125 on top of the $160 purchase price.

This makes the total ownership cost of the SF-04 as $285.

These prices exclude toothpaste, water, electricity etc, but you get a good idea of what you will be spending.

Sharing the unit with another user or buying when the prices are particularly competitive will help keep ownership costs down. 

Given the very small differences between the SF-03 and the SF-04, I can’t really suggest you must buy 1 particular model over the other.  If there is little price difference there is argument to go for the SF-04 Professional to get the minimal extra benefits.

I don’t think the pricing of the Sonic-Fusion 2.0 is terrible. It is relatively reasonable given what is on offer.  

It really is the price of the brush heads that have a negative impact on the long term ownership costs

I believe it is important to consider what you can get if you buy a toothbrush and water flosser separately. Financially, it looks much more attractive. 

Using the Sonicare 4100 Series and the Waterpik Aquarius as examples, over 3 years this works out at approximately $237.

The Oral-B Smart 1500 and the Waterpik Aquarius costs around $205.

This is a saving of $60-80 as a rough guide.

But, you don’t just save financially, you benefit from the extra features these brushes and water flossers offer.  

The Sonicare 4100 has a pressure sensor and a brush head replacement reminder system. 

Admittedly the 4100 or Oral-B Smart 1500 don’t come with a travel case like the Sonic-Fusion 2.

The Aquarius water flosser has a larger water tank, more tips and more control around the water flow.  Those with periodontal pockets and implants can make use of the WP-660 in ways they can’t with the Sonic-Fusion.

The benefit of separate products is they actually offer more versatility and suit a wider variety of users than the Sonic-Fusion. 

Waterpik does offer their complete care 9.0 or 9.5. These are essentially separate units, but share the same base unit for power/charging.  You are looking at a purchase price of $100-120. That is a saving of at least $30 over the Sonic-Fusion 2.0. 

When priced over 3 years these work out in the same region of $220.

Please note that all prices quoted are approximates and will vary based on location, supplier and time of purchase.  These figures were correct at the time of writing and should not be relied upon as hard fact, but used as a guide during your decision process.

Summary of price & where to buy

Recommended retail price of $219.99 for the SF-04
Recommended retail price of $179.99 for the SF-03
Average selling price of around $150 for SF-03 & $160 for SF-04
Replacement brush head retail for $25 for 2 ($12.50 each)
Costs in the region of $285 to own over 3 years
Better value achieved by buying alternative separate products
Consider Oral-B Smart 1500 and Waterpik Aquarius or Waterpik Complete Care system

Reliability & long term use

I can’t say I have any immediate concerns about the reliability of the Sonic-Fusion 2.0, having been testing it for a few weeks.  

If any reliability issues came up with the original version, I should imagine these have been addressed in this newer 2.0 model.

A possible risk here is when the toothbrush and water flosser is combined is that if one fails they both fail.  The chance is low, but possible.

Should the worst happen, it is nice to see that Waterpik offer a 3 year/36 month warranty.

Very few brands offer a guarantee for this length of time.  For me, this is a sign of Waterpiks confidence in their own product, but also the level of commitment they wish to deliver to users.


I admire innovation and I do understand what Waterpik are trying to achieve with the Sonic-Fusion 2.0 flossing toothbrush.

It is without doubt an improvement on the original.  The battery life of the toothbrush has improved a fraction and the noise is certainly far more acceptable.

There is a place for this in the market today.  Those who want ultimate convenience and don’t have advanced oral care needs can benefit.

But, for me, unfortunately, my conclusion having tested the product is much the same as the original.  I think that the vast majority of users are better served by a separate water flosser and electric toothbrush.

2 separate items will take up more countertop space.  But, these individually offer more features and will serve many users better than this combined option.

My recommendation is a Waterpik water flosser, they do make the best ones.  The Aquarius WP-660 is my top pick.

As for an electric toothbrush, you want to consider the Oral-B Smart 1500 or the likes of the Sonicare 4100 Series.

Size guide

  • Water Flosser Height With Nozzle - 27.6cm / 10.9 inches
  • Width - 13.3cm / 5.3 inches
  • Depth/thickness - 15.2cm / 6 inches
  • Weight with nozzle (no water) - 753g / 26.6oz
  • Package weight - 1225g / 43.2oz


  • 71dB - Brush / 80dB - Water Flosser

Country of manufacture

  • China
Author: Jon Love

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