We had one Bulldog that was having knee surgery and needed to be separated from two others while recovering. This was excellent! It gave her enough room to move around yet not enough to run or jump or play. The top is removable so we could reach in, but was high enough she couldnt jump. After she recovered the other two liked to go in and lie around and play in it.

Pros: Great construction, folds up out of the way in the closet for use later.
Cons: NONE!