Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very Disappointed

We had high hopes for this product. It turned out to be a dud. We have two small dogs, a seven year old pomeranium, and a one year old papillion. It didn't even stop them from barking even at the highest level. We tried putting the Bark Free in different locations, and that didn't work. As far as I'm concerned it is a waste of money, and I wouldn't recommend it to anyone!!!