Instruct: Classify Amazon reviews into positive or negative sentiment
Query: good product poor quality

The spray commander was recommended by a trainer I hired. My dog sometimes had anxious behavior and got too excited around certain people. The trainer's collar worked great, so I bought one and they're pretty expensive. Out of the box the sprayer would not work but the sound did. He actually responded to the sound, and I was ready to send the collar back when the sprayer started working. It's such a great tool, but the trainer said they only work about 50% of the time, so be prepared.