I had been looking for a puppy playpen due to the fact I have two dogs, one large and one little. On occasion I have to separate them due to varies reasons. I saw this and knew it would be perfect! Once it arrived it was easy to pop open and zip up the top and bottom portions. My dog weighs 17lbs. and this is more than enough room for him. He likes to go in by himself to rest and play with his toys without his big brother bothering him. It will be perfect in the backyard as well in the warmer months. I highly recommend if you have the room.