I use this toothbrush since 1 1/2 years and I've (unfortunately) no better device found. This unit cleans very quiet and feels in the mouth wonderfully quiet ("surprise" not like other devices) on. It cleans very gently and is therefore ideally suited for Braces. The cleaning result is also outstanding. The teeth feel perfectly clean and soft. Likewise, it is not promised too much when it is asserted that the teeth are total of brighter. Here go the handpieces in all regularity and at the latest immediately broken after the warranty period. On the Internet you can read anywhere how disappointed consumers all make the same experience: the On-Off button can no longer be operated, the device shuts down suddenly by itself, etc. Therefore, I can only sum up by saying, a great device that was found too short life is way too expensive.