Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Do not waste your money on this heating pad!

Sunbeam Health at Home HeatFlex Stingray Shaped Heating Pad with 4 Heat Settings and 2 Hour Auto-Off, GreyThis has to be one of the worst products that I have ever purchased from Amazon. I plugged it in days ago and I am still waiting for it to warm up. Only one small area in the very center of the pad gets minimally warm. I am extremely unhappy with this product and will be returning it for a refund!