With respect to the Mk 85 or this release? There was something bugging me about this one and I finally figured out what it is - the proportions, especially with the Tony Stark head on the thing. With that sloping shoulder armor, he'd need a neck like a stork to actually wear this thing, and he'd have to dislocate both shoulders in order to have even the slightest chance of his arms reaching those positions. I know almost all IM figures are a bit off when it comes to "man in the suit" believability, but this takes it to another level. If I bought this the head sculpt would never leave the box.
The practical suit has those sloping shoulders too.