No complaints in behalf of me or my dentist. There are different settings for various teeth sensitivities however I have not been able to find a difference between the 3, and therefore I just stick to the regular. Automatic timer shuts the brushing off after two minutes and gives you a little alert at 30 second intervals which I use to evenly divide my mouth into four sections. Battery lasts well over a week which is more than enough for me. Slight complaint that the travel pack is a little large and if you're afraid you might need to recharge, the charging station offers little mobility.