After reading the other reviews of this product, I am beginning to believe that I received a malfunctioning heater, because the one I got is terrible. It is very slow to heat up, and although it reaches sufficiently warm temperatures, it only maintains them for a few minutes before it seemingly shuts itself off. I've tried to "reset" the unit by switching it off and then back on, but it won't heat back up until after it's almost completely cooled off. This results in about a 20 minute cycle of which I might get less than five of satisfactory heat levels. Once again, I can't believe that people would write good reviews about a product with these characteristics, so I will be contacting the warranty office. Then again, given the price, I may just get a different one.