I bought one of these which, whilst utterly naff, looked very snuggly --wasn't prepared to pay £60 for one of the posh ones]].
DCat has a little basket in the kitchen next to the radiator but is a beggar for enclosed spaces. It took her a good week to work out how to enjoy it but now I come home to contented snoring or kneeding with bum waving out the end from this, housed in the living room. LR is less warm than the kitchen but she prefers to sleep up there. I am wondering about getting a couple more and putting them in her favourite places (top of the wardrobe in the hallway in our tiny flat, and another in the kitchen where her basket is when she's confined to quarters when one of us is working from home or she's peed somewhere inappropriate.
I am very pleased I've made her happy - anyone else have enclosed beds for cats?