Checking it was a disaster. The airline thought it (packed with all the other accessories) was a bomb and I actually had to speak with the police. I missed two flights because of the background check hold up (plus they threw away my grenade mod and several LEDs!) The flight back they just searched the bags- hopefully the PLEASE LET ME EXPLAIN letter + 10 business cards I packed with it helped. The launcher got pretty destroyed each way because they didn't bother putting all the foam supports back so it just bounced around. Next time I fly for a con, I'm bringing something small and spandex that I can carry on.
Everyone seemed to like it, at least. I'd say it was worth the hassle to get to premiere the costume at such a great con. Plus, I wasn't totally embarrassing in the costume contest and pulled second in the Video Game category.
I'll go ahead and post a thread in the showcase!