Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Invest in a better product

This product claims to auto correct the dogs barking... But it does not. My dogs behavior did not change at all. In fact the collar began to shock him when he was not even barking. I was then sent a replacement product that did the exact same thing. My poor dog was terrified of the collar after being shocked repeatedly for no reason. I would not recommend this product to anyone.