Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It works.

What can I say. This product works really really well for preventing hairballs (though it doesn't eliminate them overnight.) The only problem I had with this is that my cat did not like the taste. He would even eat around it when I snuck it inside his treats. I had more success mixing it in with wet food. Your mileage with that will vary, of course, because every cat's taste is different. <:3