Very frustrated he is that the roof is constantly falling apart, even if it only decreases without necessarily order to "fly". Son goes very carefully with his Lego to and has in some cases sets that are really only set up in the cabinet ..
And unfortunately it is virtually impossible in the complex and nested structure of the Star Destroyers, the roof "fast" again to fumble together - even for me! Twice had to disassemble the roof already completely back and rebuild son, because in trying to repair the roof, while others parts are dropped. The rest (trunk) is very stable and I personally find this exceptional price / performance ratio for Lego ok. The spacecraft is built already huge and very impressive!
I just doubt precisely that the Star Destroyer was really designed "to play," probably "be in the showcase" rather to.
Too bad !! Lego is now and remains times a toy!