Contrary to popular belief here often poor, the processing was miserable, I have to disagree here. I use the brush for almost four years, and surprise, surprise, it is not fallen apart. In addition, you should also charge the battery load times, so that the "vibrations" can be perceived that anyway only serve that you know that the device is running. And whether mechanical engineer or NASA scientist, you should know that just not any media ultrasound well promoted equal. All in all, I am a victim of Paradontits very pleased with the brush. In addition, my teeth have become brighter and smoother. Even my bleeding gums is gone. And those who argue here that their old normal electric toothbrush is better, I can only say: Why did you then buy a new one? Or are you of the "competition" that has no patent and rumunkt here?
