Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Don't buy this product

I have used this type of product for many years, never this brand. This one has doubled my electric bill and keeps the water at > 40F. It is not low profiled as advertised, and stays on much of the time, even when the temperature is >45F I contacted the company and they were very uncooperative. I would highly discourage anyone from purchasing this product.