I have 3 pit bull mix puppies (8 months 50lbs). I purchased one for each pup. This is where they sleep at night but often choose to take naps during the day. They appear to be very comfortable in them, and haven't chewed on them or the pillows in them. They automatically go into them after they last outside bathroom break. I like the fact the fold up to store, the rollers make them easy to move, and light enough to move to the car when transporting the dogs to the vets or for outing. Since they are use to the crates they seem to be more comfortable when transporting and seem to help prevent their car sickness.