I have a hairless Chinese Crested and was hoping this would help her during the winter months. However, this product does not warm her any more than any regular bedding would. And the insert has a very loud "crinkling" sound when she circles to find a comfortable seating arrangement. None of this is bad enough to trouble with sending it back. She still sits on it when in the room in which we placed it.
I have never purchased a self warming cushion, so I guess I was surprised how thin it is. The 'warming' foil inside makes a crinkly sound when my dog gets on it, which she did not like, but after a couple of tries, she will lay on it now, but not for an extended period of time. Maybe over some more time, she will get used to it and like it. I have not really been able to determine the 'self warming' aspect. So for the price, I would say it's OK.