I who have sensitive gums I found my happiness! A friend has offered me, for thinking that people were exaggerating on this type of product, I never wanted to buy. What nonsense, the same day I threw my hand! More plaque, a real feeling clean without irritating gums. I come finally to brush my back teeth with ease! The flossing brushing ultimately proved to me that she nettoit really well. I even like to brush my teeth 4 minutes, 2 min up and 2 down to a PERFECT brushing. The timer is TOP, it's just the charging indicator is missing for me. Do not hesitate if you have sensitive teeth, it is good!