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

The first one worked for 2 days, then the display went out; I exchanged it for a new one, and the display would not light at all. I made sure I used new, charged batteries. When I called the company, they said they were very sorry, and recommended I either exchange it again, or send them pieces from the non-working one with a copy of the receipt, and they would send a new one. Am so aggravated, am returning it for a refund.