My son is allergic to cats, also we have birds, so it is necessary to kennel our cat at night and when we are not home. This Playpen is amazing!!! It gives our full grown cat much needed room to relax, and he LOVES the bed. 
The doors are super convenient being upper and lower doors, and they are big enough to get a large covered litter box in and out of without any problems. I have nothing bad to say, it is exactly what we wanted, and it's what we got, GREAT price to boot!!!!