Instruct: Classify a given Amazon review as either positive or negative.
Query: Junk.

I'm surprised Amazon is selling this low quality item. If you read the reviews on the King size pad with the same features, it's more accurate. This did not get warm enough even on high. I used it exactly two times over a two day period and then it died. It's not worth the warranty fee of $5.00 plus the postage to return it to Homedics. Pure junk.