Very good toothbrush. I got it because my dentist recommended that I get an Oral B IO. The size of the head is a bit larger than the classic Oral B ones (i.e., all those that are not IO), which personally suited me very well as it covers the entire surface of the teeth. It makes less noise than the Oral B Genius, for example. I had the Sonicare Diamond Clean for the last few years and I can say that I like the Oral B IO much more. It took me days to get used to the Sonicare as it tickled me at first; I also feel that the Oral B IO doesn't make as much noise and I prefer the sensation I have during cleaning. Finally, it cleans much better, especially between the teeth, and for me personally, it is easier to use. So far, I mainly use the gentle care head, which I believe is the best option, especially for beginners. The app is good but not perfect; sometimes it takes a little while to understand where in the mouth you are. I can say that the pressure sensor has helped me a lot, as it shows you when you are applying the right pressure and when you are applying less or more than you should. I am generally excited about how clean it feels; those who say it feels a bit like having a cleaning at the dentist are right.