Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Wonderful product

My cat used to urinate outside the litterbox. Our vet recommended Feliway, and it has been a godsend. He is mellower, more affectionate, and only has accidents when he has a urinary tract infection, or if I forget to change the feliway when it is empty. We saved so much money by buying this on Amazon instead of at the local pet supply store.Thanks so much.Debra Laflen