Every animal I've seen with any size of these absolutely loves it. I hope whoever created these is a very rich person. Any small animals I have in the future will always get their own igloo.
Great for sleeping in, hiding in, or sitting on top and lording over the room. They are very easy to clean (when you can get it away from your pet long enough). They're also light enough that the animals can pick them up and move them around when they want to.