Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Violent and loud

The toothbrush does leave your teeth feeling very clean after use. But it is SO loud and violent.I only use it for a week and it hurt my gums in one area and I have to avoid brushing there.I keep going back to the starters mode to have it more bearable.I am trying to understand if I got a defective unit, or if this toothbrush is just too much for my gums. I was using ORAL-B Sonicare for 3 years without any issues.Would be interested to hear from other customers about their experience. At this point I'm afraid that it might be just too rough and maybe dangerous too keep using it.