"I loved the shuttle, very real looking, and was fun to build. While very cute, the Moon Station was a little disappointing in that the backside is "open" to the "vacuum" of space, and seems incomplete. I realize that 3-1 kits are limited by the parts available for the main assembly. There are attachment points there that would seem to indicate that perhaps there will be other kits available in the future that would attach. In the meantime, one has to use their own available parts to enclose or enhance the Station. And that's part of the fun of LEGO."