Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worth every penny!

I have a black lab with a gorgeous, shiny topcoat, but with a very thick undercoat. Despite this healthy coat, he's always been a shedder. Though I had heard of the Furminator, I was dubious as to its mythic powers (anything advertised via infomercial has to be a scam, right?), but was willing to try it, as regular dog brushes yielded little fur.This product is INCREDIBLE. I hope its inventor is a quadruple-gazillionaire, because a few swipes with the Furminator pulled out so much fur that I can practically build another dog out of the pile of hair. My dog's coat looks even sleeker now, and more importantly, he loves the way it feels (must be a big relief for him to get rid of all that dead hair) whereas he hated being brushed.I highly recommend this product to anyone who owns a hairy beast. You won't be sorry, and your beast will thank you.