Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Replacement Brush

I'm not that big a fan of the IntelliClean system, too much going on with the toothpaste and awkward head. But my wife bought it to replace the old one which broke, so sort of stuck with it. The replacement heads are hard to find anywhere...so I have to say this was a very good deal. Fast shipping, highly recommend...Amazon was the only one on the net who had it in stock at the time I bought it and for a very good price.