Not everyone's cup of tea
I bought these for my husband, and tried one myself. He likes them. I don't. The head is too large, the open vents on the back of the brush drip water/toothpaste drool down your arm the entire time you're brushing, which I find offputting. Those same vents must be thoroughly washed out at the end of each session, otherwise sludge remains inside the brush. The battery life is quite good.
Rating: 3 stars