Instruct: Classify a review into positive or negative sentiment.
Query: save your money

I purchased this product because it was Frontline and the price was so much better than the local stores. However the product must of been old. The first time I used it it only worked for two weeks, I was trying to hold out putting a second dose on my dog but he was suffering so by the third week that I had to apply the second dose. The second dose didn't work for more than a week!! Maybe that was only due to bathing the dog and spraying (plus doing a good vacuuming)Anyway didn't bother with the third dose, very disappointed, unfortunately I've been so busy that it has been two or three weeks since the second dose also didn't work and way to long to get a refund. So learn from my experience and don't waste your money buying this product from Amazon because obviously Frontline is sending their old products.