Instruct: Classify Amazon reviews into positive or negative sentiment
Query: DO NOT BUY THIS PIECE OF CRAP!!!!

I have had this paper weight for 5 months now. I can not get it to read me more than once or twice a month.For the first few weeks I literally tried 25-30 times a night because I was assured it was a good one.I searched the internet for clues. I emailed the company with no replies.I reposition the cuff over and over and over to no avail. I still try an average of ten times a night now because I am supposed to monitor morning afternoon and evening. Most days I get nothing but errors.The pharmacy won't take it back but they couldn't get it to read me either. We opened three other boxes there with the same results.