Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worst POS I've ever bought

this is the worst POS I've ever bought. It stops working randomly and might work for awhile, then the damn thing stops responding again. Over and over and over. I finally threw it at the floor as hard as I could. I feel better and I even think the mouse might work better...if I glued it back together. Spare yourself and DO NOT BUY THIS PIECE OF CRAP.It's so bad, I've gone back to a wired mouse....yes it was that bad.