Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Didn't work for me.

This thing scares our cat half to death if it's activated with 10 feet of it. Cat tears off into another room to hide. However, the extremely annoying dog 20 feet away from our back door is unfazed by this device. Just not powerful enough. Better results by spraying neighbors dog with the garden hose.Overpriced for what it is.