I bought this to replace a competitor's model, and it seems to do a much better job of cleaning teeth and removing plaque. On the downside the app gets confused as to where I am brushing. I see no evidence it monitors 16 zones. More like 6.

I have never felt my teeth so clean even after a cleaning at the dentist. This this is worth every penny. How did I ever live without it. Convincing everyone I know to get one!!

This toothbrush truly made my teeth feel like I just left the dentist office. It is a way different experience and gives a different feel from other toothbrushes I have used.

[This review was collected as part of a promotion.] This toothbrush has been a godsend when it comes to cleaning between my braces. I've ruined so many other brushes before that never got into the hard to reach places. Definitely would recommend!

I have been enjoying my iO Series 9 toothbrush for 2 years I have not had any problems Dental check ups are always good and I noticed the Dental assistants have an easier time cleaning my teeth I also enjoy zero pain

I've just started using my Oi toothbrush but for the price paid, I can't believe it doesn't have a little plastic cap to go over the brush head when on the charger.

I've used a Sonic Care brush for many years until I spoke with a friend who switched to Oral B. My husband surprised me with an Oral B for me and one for him. I cannot believe the difference in the way my teeth feel and look.

Provides very thorough cleaning. My only concern is lack of accessories. The less expensive model, the iO-7 comes with brush head holders, how come the top of the line model, the iO-9 does not?

The brush looks and feels great. However, no matter all the different troubleshooting methods I try, the brush will not connect to the app. Very disappointed.

Splurged on this brush after getting several recommendations from my friends and WOW it’s worth it. Feels like I just left the dentist’s office. The app works well and is very engaging. Really recommend this to anyone, it’s worth it!