I got him a little less than a week ago. I know he's still adjusting. I just want to make sure he's able to thermoregulate. Overall, I'd have to guess he's comfortable. He's not roaming alot. The first 5 minutes I put him in there, he found the hiding spot on the right, which is where the UTH is, and he stayed there. You can see in the pics, he was out and about.