Review (5/5): Feels like you just walked out of the dentist for less than 20 bucks!
I love this toothbrush. It gets my teeth super clean. Unlike the fuller head counterpart, the small round head allows you to give each tooth individual attention. The head would be small enough for a child to use. It is also lightweight. It is quieter than other brands like the cheap Crest power toothbrushes. It gives the cleaning of a much more expensive toothbrush.
The replacement heads are a bit pricey. I leave mine on the charger to store it. It loses some power quickly when not fully charged, but still cleans acceptably for probably 4 days of no charge. The timer is a great feature to let you know that you're brushing long enough. It takes so much less effort to brush than with a manual toothbrush that you will have no trouble getting those 2 minutes in.
Some other reviewers have complained that the battery quit taking a charge after a year or so, but even if that happens you're still better off cost wise to replace this toothbrush many times over than to pay the hundreds of dollars to get the same clean in a more expensive brush.
I recommend this brush to anyone.