I am furious about this product. The heating wire is a such a bad design even it works as to keep warmer longer or cook faster, but the problem is:first, it damage your oven top. I didn't realized until it damaged all my four porcelain coated wire grated of my 2000$ whirpol range.Second, it's extramely hot and dangerous, you don't want handle this kind of danger at home, it burns my gloves, burns my table, and sometimes if you are not careful enough, it burns your everything....and be careful, the customer service of this company-- Sunpentown is aweful....