What I like about the play pen particularly good flexibility. Inside the apartment is not as much space as we only use four side panels, out in the garden every six side panels can then be used. A small drawback is the "safety door". Our little girl is now 1.5 years old, and made it within only about 4 days to pick the lock. Now we have to think about a new fuse, as it easily up her door and can turn.
