I ordered two to keep the outside cats warm on our enclosed back porch. I put them out for a couple of days to let them get use to them. They sniffed them but wouldn't step on them. I sprinkled a bit of catnip on them after two more days. They still won't get on them. I hope I didn't waste $140!!!  
If the cats decide to use them, I'll upgrade this review.
UPDATE:  Cats love them now.  Even the indoor cats go onto the porch and lay on the mats.

 

Pros:  Soft, plush cover.  Cord is covered for safety.
Cons:  If the cats won't use them they are a total waste of money.  Took a little time for the cats to get use to them.