Spectacular, and somewhat stupid (vague spoiler inside)

Rating: 5/10 (11 May 2013)

They introduce but don't resolve a major issue with Tony, but unnecessarily "resolve" an issue central to the character. Bad physics in evidence throughout, and Tony does some unnecessarily stupid things. The explosions and spectacularly unlikely falls are so numerous as to become numbing.
Most overused: the suit-falls-onto-Tony-midair-in-nick-of-time routine (I lost count).
I'd gladly re-watch either of the first two films or the Avengers yet again than this.
Disappointing.