The size is fine for up to three hens to get some sun, it gets a bit crowded after that.  The lock on the roof opening is awful, I replaced it.  If I was using the side door I would be replacing that lock also.  The wire on the cage could easily be pushed in by an animal, dog, raccoon, skunk, etc... I re-wired it with mesh on top of the mesh it came with to make it critter- proof.  I do like it though, I bought a second one for inside for the winter.