Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not the same quality brush heads!

These brush heads are not the real McCoy! There are two major problems with this product. 1. The brush heads don't fit on the tooth brush properly and must be pushed down very hard. 2. The brush head doesn't rotate back and forth properly. It rotates when you turn it on, but the minute you apply pressure against your teeth, the brush head just vibrates vigorously but doesn't actually move back and forth like it is supposed to. I'll probably contact Braun, but haven't had a moment to do so yet. Very disappointed.