First of all, the description is factually inaccurate. The heating pad is MAYBE 9x9 inches - not 15. And the "thick Berber" cover is "thick" only when compared to the thickness of a solitary sheet of paper. My chihuahua took one - one! - scratch/rub (you know, that burrowing motion) and I doubt the cover would have withstood another. The tiny heating element barely got warm. How it was supposed to heat a "bed" 30 by 40 inches is a mystery.
Needless to say, I returned this piece of trash for a full refund. But despite the fact that Amazon's Customer Service is exceptional (no issues in returning for a full refund), I am actually a bit dismayed that Amazon would so falsely advertise a product (or allow a vendor to so inaccurately describe a product). Is there no accountability?
In short - DO NOT waste your time with this worthless piece of S---. It it not worth the return trip to the UPS Store.
(Would you believe Amazon will not allow me to NOT rate the item at least one star? Even though one star = "I hate it" I don't even like the idea of gracing this garbage with that.