The crates are very stable after assembly. Keep also some from. It fit exactly normal Sietzkissen purely and other stuff is also good accommodated. For the balcony a perfect match, because space-saving and flexible convertible (right light box).
When assembling one must possibly. Help out. I had to cope grind a base because it was too broad a few millimeters, although the side panels were properly screwed together. In a second case there was nothing to complain about.