Worth the $20 it costs!
I know what you're thinking: should i believe the 5-star reviews or the 1-star reviews? I've been using mine for over a year with no problems. Alkaline batteries last fairly long (more than 2 weeks) brushing twice a day. I don't brush my teeth underwater like many of the 1-star folks apparently do. i wet the brush with a little water, put on a dab of paste and try to brush as best i can with the base/handle higher than the brush so less water/saliva runs toward the base/handle. i clean the brush by, again, holding the head/brush lower and pouring water only onto the head/brush...none even touches that battery cap with holes in it on the base. if i feel that water got into the base or screw-off head/brush, i open and check for water and dry as necessary. the battery cap at the bottom seems all right: i'm kinda careful when i take it off though. power is good although u can feel it getting a little weaker before the batteries die. overall very happy with it.
Rating: 5 stars