The thing I've noticed so far, and I think AP mentioned this - is that shelves don't quite fit into the corners as the inside corners are rounded. So any wood shelves need a little corner cutting off to fit against the back and the side and into the rounded bit. I actually quite like the green shelf and nearly used it, but being paranoid about safety I was a bit concerned about the holes round the edges of it - a hammy could get a foot caught. Highly unlikely and haven't heard of any issues but it bugs me
So will do something else.
I actually really love the size of the Barney for setting up but this is good too - and much easier to pick up.