Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Spend the money and get the product at the vet

I researched frontline plus as much as possible after using Hartz and loosing the battle against fleas. I dosed my dogs immediately with Amazon Frontline Plus on arrival. I dosed them again a week later (against recommendations) because the fleas were still going strong. Took the dogs to the vet a week later and learned that amazon frontline plus may not be the real product and may have been packaged incorrectly. GREAT - just lost $120 thinking I was being smart ordering on line... Don't do it!!!!!!