This is an excellent toothbrush with a wide variety of cleaning settings to suit every need. The app works well except that it does not always detect where the brush is, not surprising really. This is the only criticism I have, I would have preferred a simpler approach of it guiding usage for an appropriate number of seconds on each segment. Not a huge point and easy to get around, I would take off half a star if that was possible. The overall feeling is one of quality and robustness.