It's kind of fragile. If you grip too hard on the top (where the droid storage is), it breaks (And often falls to the floor). The wings CAN fall off, do NOT shake the gunship too much. And the cockpit normally can't be opened without the glass falling off.
I missed out on the original sets so I jumped on both the new ones. I don't find much wrong with the gunship, except its shape could be more accurate, but it is plenty strong enough, and big. The at-te is just ok. Its sturdy, but you can't do much with it, and the legs can't move much. the new mtt has good value because of minifigs. I was underwhelmed by the at-te, but I think all the sets you mentioned are ok as far as strength goes.
Hope that helps. And don't worry about this not being Bible related there is no rule that says threads must be spiritually centered, in fact I encourage more lego oriented conversations, to help us all become better builders. :-) Permalink