Better than I expected [SEP] After reading the reviews, I was afraid of some of the problems mentioned: battery life and water in the housing. But I can't afford the higher end version so I bought one for my daughter (as recommended by her dentist) and one for myself. They work well we have had no water leakage problems. In several months, I have had to recharge the batteries on mine once (I use rechargeable) and my daughters is still running strong (she lives here halftime so it gets less use). The brushes are serving their purpose and I'm happy with them.