Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A waste of my money.

I normally buy Advantage, and decided to try this product since it was cheaper. Never again. I wasted my money, so I didn't save a penny. I will now have to buy Advantage, since this product did not work. My cats are blonde and orange, so it is very easy to see the fleas on them. And this product, after 3 weeks, did not help at all.It is worth it to pay more money for a product that works, instead of being ripped off. Little wonder my Vet doesn't sell this.