Philips Sonicare DiamondClean Smart 9300 Electric Toothbrush

The metal tip to attach the brush head gets loose after 2 years of usage. According to online information, it appears to be caused by a loosen screw on the mechanism inside after vibration over time. It is not a good idea to use screw or nut and bolt on a vibrating mechanism as they get loosen. In addition, it doesn't provide user friendly access to tighten the screw. Totally bad design to where screw is needed.

[This review was collected as part of a promotion.] Everything works well. xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

[This review was collected as part of a promotion.] great job cleaning teeth and gums - easy top use and clean

[This review was collected as part of a promotion.] Love the way the toothbrush lets me know when I put too much pressure on gums. Was told my gums looked abraded after having switched to another brand over a year ago. FYI, one's gums never recover. Never again - back to Philips' quality!

[This review was collected as part of a promotion.] This is my third diamond clean in six years. They are great, but they don’t last long The quality control is not that great either because this one is very loud

My previous Philips electric toothbrush lasted about 8 years…but this one is a nightmare, and I regret buying it. Same problems as everyone else here. Original HX992P lasted 8 months, replacement lasted 36 hrs. It seems like the motor is too strong for the other parts so everything falls apart

[This review was collected as part of a promotion.] This has been a difficult transition but I do feel it’s a great toothbrush. I have a very small mouth and you no longer have compact brush heads Th heads are quite larger than I’m used to. I do enjoy the other features of the toothbrush.

[This review was collected as part of a promotion.] We have been using Philips Diamond Clean toothbrush for several years and have always loved it and our dental exams show it's working. Sadly, old faithful finally gave up the ghost after several years of service. So we upgraded to the latest version and, wow! So much better than even the previous version. Looking forward to several more years of good exams.

[This review was collected as part of a promotion.] I give a 5-star rating to this electric toothbrush as it is efficient at cleaning teeth and is very useful especially to those who brush too hard and can damage their gums. Its different settings allow you to customize the brush effectiveness.

This is my second sonicare to stop working. There is soething fundamentally wrong with them and they have to be using super cheap components as they are breaking way too quickly. The cost relative to the reliability is as bad as any product I've ever used. FIND OTHER BETTER OPTIONS.

[This review was collected as part of a promotion.] Great cleaning and easy to use. The charger looks very stylish. I like the way the brush responds to my use

[This review was collected as part of a promotion.] Recommendation from my dentist at Meetinghouse Dental

[This review was collected as part of a promotion.] I get cleaner teeth with Philips brush, this is my second one.

I have had this toothbrush for 4 years and it still works just as it did when it was brand new. Other than replacing the brush heads and charging it, I haven’t had any problems with this. I have traveled with it extensively with no problems. Very worth the price tag and definitely would buy again.

[This review was collected as part of a promotion.] This is the best toothbrush I have ever used in my life

[This review was collected as part of a promotion.] I came from an old E-Series toothbrush, and loved it. I was reluctant to upgrade, but have been very happy with the DiamondClean series so far. It takes a little time to get used to the new 20-second intervals. I wish the DiamondClean had 10 second intervals as well, but I don't see that option. What I STRONGLY dislike about this toothbrush is the travel case. It's HUGE and doesn't even provide a USB charging port. There's no need for the case to be this big and I would argue that it shouldn't qualify as a "travel" case because it's going to take up a lot of room in your bag. You're better off just putting the toothbrush in a Ziploc bag to save space. I hope they fix the travel case in the future because it really feels like an afterthought and not what I would expect from Phillips.

The product is easy to use and holds a charge very well. I like that I do not have to constantly charge it. The different levels on the toothbrush help enhance the cleaning power and I like that.

It just became dysfunctional after 1 year. Ridiculous!!

I have been using Philips sonicare brand and none last after the warranty period.

I’ve had two of these DiamondCleans in the past 8-10 years. They’re great products but they have consistently broken down on me. Each time I bought one, I had to send them back within the first two years due to malfunction within the warranty and then I get another 2-3 years out of them. The most recent purchase was 2019 with a replacement sent in 2021. A week ago, the motor started malfunctioning again. From my experience, these have a shelf life of ~5years.