Instruct: Classify an Amazon review into positive or negative sentiment.
Query: As Good as Sonicare for a fraction of the cost

Vibrating toothbrushes are essentially very simple products. It's amazing that advertisers have figured out a way to get people to pay so much for the Sonicare (and to a lesser extent the Braun). I've used the Sonicare Advance (haven't tried the Elite). The Ultrasonex seems just as good, and battery life seemes even better. (Be sure to charge the unit according to instructions for maximum battery life). Also, the replacement heads are very affordably priced.