Review (2/5): Poor design, good idea
Good idea, but not designed very well. The brush goes too fast, the brush is too small and the hard plastic handle hits against your teeth, and rattles on them, if you don't have the angle just right. Also, when you brush your teeth normally, you turn the brush around and up and down; thus, water running out of your mouth, goes all over the housing which allows water to get inside the housing.