I has nice building techniques, but unfortunately, it's all hidden behind a rather sparse exterior and doesn't look very exciting at first glance.
The playing features are cool (several stages that can be separated and put back together), but way too fragile to actually have children play with it.
It's a very fine display model, though. I've put it on a bureau right when you enter my apartment.
The ISS is superb, too (and rather cheap), but the new Space Shuttle was where I eventually drew the line. My pocketbook is very thankful for that.