Geez luweez, I am just full of questions lately....sorry guys

I am just trying to get some things ready for Tatum's LP surgery.
I got the Doctors Foster and Smith catalog in the mail yesterday and they have a Thermo Dog Bed that I am very interested in getting Tatum for after her surgery. Or even for now, to help with pain.
The dog bed that I want to order her is here:
Thermo Dog Bed: Plush Dog Bed Radiates Gentle Heat for Older or Arthritic Pets - I was just wondering if anyone has this bed and has any reviews on it? Or, if you don't have this exact bed, but another heated dog bed I would be interested in hearing reviews on it as well.
My knees hurt me alot and when they do applying heat to them really does help, so I think that Tatum would really enjoy one of these beds as well.