Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Junk!!!!

Used it for 2 months and sent it back. every other day the thing would make a clicking nosie, so my wife had to unplug until I got home. I would have to use a screw driver and wedge the track back on. When it works, picks up pee great but not the poo. Sent back to amazon for 50% refund and I had to pay shipping to send it back. Going to pet store.