Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I can't believe someting finally works like it said it would.

This is a truely amazing product. After being adopted two years ago by a beautiful snitty little cat who grew to an adult before our eyes. A few weeks ago another even smaller baby cat found its way to our door and we had to adopt him. The first few days were great but then the older cat started attacking the little one and would not give up. He was clearly unhappy. We got this product and plugged it in and almost immediatly the older cat started calming down and started playing with the little kitten again instead of attacking him. Weeks later and a second bottle of this product, I can't believe how well they play and they are best friends now. This stuff worked better than they even said it would!