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Customer Ratings & Reviews

Your price for this item is $131.99
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The comparable value price is $219.99

Customer reviews

Rating 4.7 out of 5 stars with 1317 reviews

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Rating by feature

  • Value

    Rating 4.4 out of 5 stars

  • Quality

    Rating 4.8 out of 5 stars

  • Ease of Use

    Rating 4.8 out of 5 stars

Pros mentioned filter

Cons mentioned filter

95%would recommend to a friend

Customers are saying

Customers find value in the DiamondClean Smart 9300's superior cleaning capabilities, user-friendly app, and long-lasting battery life. Many appreciate the toothbrush's design and ease of use, though some express concerns about the high price point. A few users also mentioned issues with charging and the travel case.

This summary was generated by AI based on customer reviews.

The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Page 5 Showing 81-100 of 1,317 reviews
  • Pros mentioned:
    Cleaning

    Rated 5 out of 5 stars

    clean teeth

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    Posted . Owned for 9 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    easy to use. does a great job cleaning your teeth.

    I would recommend this to a friend
  • Pros mentioned:
    App, Toothbrush

    Rated 5 out of 5 stars

    Great toothbrush

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This toothbrush is fantastic!! I love that it has several heads to accomplish a wonderfully clean mouth. The app is also great, it tells you exactly how you are brushing.

    I would recommend this to a friend
  • Pros mentioned:
    App

    Rated 5 out of 5 stars

    Love it

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Worth the price! Great toothbrush! Very sleek looking. Love the app’s help.

    I would recommend this to a friend
  • Pros mentioned:
    Toothbrush

    Rated 5 out of 5 stars

    Great

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    Posted . Owned for more than 2 years when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This product is awesome!!! I had no issues with this item, it worked very well and I would buy it three times over.

    I would recommend this to a friend
  • Pros mentioned:
    Toothbrush

    Rated 5 out of 5 stars

    Good brush

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    Posted . Owned for 3 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    It was my time to ditch the traditional brushing and get electric brush. My dentist wanted to me buy one from her, but as much as I like her practice I was not going to be overcharged for one. Plus, it was on sale on bestbuy, so I bought it here. And boy, I made a good decision. My tooth feels clean. Mouth feels fresher. My arm less tired. It comes with a cup for rinsing afterwards and I think it is a good addition. I don't bother using the app for this brush, so I can't complain about it.

    I would recommend this to a friend
  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    Wonderful Sonicare

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    Posted . Owned for 3 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I've owned a Sonicare toothbrush for over a decade and this is by far the best I've ever used. The iPhone app will just make you use it more and thus give you healthier teeth in the process. I've taken on one 72 hour trip and I had no problem with the battery life on two uses a day. Comes with a variety of toothbrush heads to decide which is best for you. I'll definitely be buying this one again when it finally dies or upgrade to an even better one. A+

    I would recommend this to a friend
  • Pros mentioned:
    App, Toothbrush

    Rated 5 out of 5 stars

    Perfect toothbrush

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    It’s a perfect toothbrush works great the app is user-friendly definitely recommend it to anybody looking for a toothbrush it’s a little expensive but it’ll pay for itself

    I would recommend this to a friend
  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    Great buy!

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    Posted . Owned for 5 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I bought this toothbrush as a second toothbrush so that I have one at the lake and one at home. It quickly became my favorite. I’ve been using this 3x a day and have not had to charge it for 3 weeks! I was wondering why it kept beeping. Looked up the issue, and found that it was telling me to switch toothbrush heads.

    I would recommend this to a friend
  • Pros mentioned:
    Cleaning

    Rated 5 out of 5 stars

    Excellent Product

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I've Come To Love This ToothBrush. Its So Easy To Use And Does A Terrific Job Cleaning My Teeth. The App Is So Awesome. It Tell You How Your Doing When Brushing.....Excellent Product

    I would recommend this to a friend
  • Pros mentioned:
    Toothbrush

    Rated 5 out of 5 stars

    Best toothbrush

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Love this toothbrush! Lets me know where I've missed brushing and directs me to go back over that area. It's awesome

    I would recommend this to a friend
  • Pros mentioned:
    Cleaning

    Rated 5 out of 5 stars

    Flawless Toothbrush

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    Posted . Owned for 1.5 years when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Best toothbrush I have ever owned. It works flawlessly and even has a cup to sit it in to recharge. It alerts you when your brushing too hard to going in a see-saw pattern. My dentist was very impressed with the progress after using this toothbrush.

    I would recommend this to a friend
  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    Mr. Sparkle-O

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I’ve had an old Sonicare for years and it’s always performed well, but the battery was struggling to hold a charge so I made the upgrade. I’ve had this for a few weeks and it’s excellent. The settings are great, the battery hasn’t required recharging yet, and it does exactly what it promises. I don’t find the app particularly useful, but it functions well. I just don’t see the need when the toothbrush provides all the feedback you could ask for.

    I would recommend this to a friend
  • Pros mentioned:
    App

    Rated 5 out of 5 stars

    5 out of 5

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Best toothbrush ever, you can feel and see the difference. Comes with an app and all

    I would recommend this to a friend
  • Pros mentioned:
    Cleaning

    Rated 5 out of 5 stars

    Great for cleaning and gum care

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    Posted . Owned for 11 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Very powerful and good for cleaning. Need to be careful when power is on to not open your lips or you get a mess.

    I would recommend this to a friend
  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    It’s a mechanical toothbrush

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I’d like to expand and share what I love about this tooth brush but it’s a 5star brush because it is exactly as described. I purchased it because it charges in a cup. I also like the heads are cheaper and have more options than my last Phillips. If lasts as long as my last Phillips then I imagine I won’t have to write another review for 10 years. I maintain Phillips is the way to go. This toothbrush appears to be another shining example of my opinion. Only gripe, it has a lot of options that I’m not interested in using. However, the options work well if that’s your thing.

    I would recommend this to a friend
  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    Cordless toothbrush

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    Posted . Owned for 1.5 years when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Great quality, Easy to use. Holds charge for a long time when traveling.

    I would recommend this to a friend
  • Pros mentioned:
    Battery life

    Rated 4 out of 5 stars

    Great brush, but the app could be better.

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    Posted . Owned for 1 year when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This is a great toothbrush. It is very powerful and the included brush heads have lasted me over a year and still look almost brand new. One concern I had when I purchased the brush was the cost of the replacement brush heads, but they last much longer than normal toothbrushes, so this is not a concern. The battery lasted two minutes of brushing twice a day for two weeks on a trip I took without charging and showed no signs of low battery. My only issue is the app. I never feel like pulling out my phone and finding the app every time I brush my teeth. I think I only used the app for about a week. The brush makes an audible change in speed every 20 seconds to notify you when to move to the next zone in your mouth, and automatically stops after 2 minutes, so I found myself relying on that rather than fiddling with the app twice a day.

    I would recommend this to a friend
  • Cons mentioned:
    Price

    Rated 5 out of 5 stars

    Great Toothbrush!

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Great toothbrush! I mean, not much to say here. It's a bit expensive. But, if you can afford it, it is significantly better than cheaper versions of the Sonniccare. So, I do recommend.

    I would recommend this to a friend
  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    Outstanding Toothbrush

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This is a great toothbrush and I give it 5 stars. Easy to use and handle grip is sized just right. It also seems to have a long battery life between re-charging. I had been considering a electric toothbrush and asked my Denist for a recommendation and it was the Sonicare that he recommended and said it is the one he uses and gave me instruction on how I should use it. I give him 5 stars for his recommendation.

    I would recommend this to a friend
  • Pros mentioned:
    App

    Rated 5 out of 5 stars

    Woah - lots of features for a toothbrush.

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    Posted . Owned for 2 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I'll be honest - this thing is overkill for me. It not only has three different styles of heads based on your needs, but also can be used with the corresponding app to show you spots you're missing when brushing AND it lights up when you're brushing too hard. This thing is incredible. If I could do it again, I would get something a bit more simple, but this is a high-quality product that will very much appeal to those looking to get as much data and insight into their oral hygiene.

    I would recommend this to a friend