Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Waste of my money

When I first set this UPS up my power blipped for a second and it saved my Compaq from crashing like it usually does, however the next day and forward it was utterly useless. The power would blip for a second, with nothing but my Compaq plugged into the backup sockets, and it would crash instantly as if back on the old surge strip and the battery gauge read depleted. I also had problems getting power from one of the regular surge sockets. I'm not sure if this particular unit simply cannot handle my basic Compaq PC or if I needed the Pure Sine Wave version or if it was defective, but the experience has me considering APC next time. I guess I'm stuck with it as a doorstop in any case since it's classified as hazardous shipping material unable to be returned. Money's tight and I sure could of used it for something else.