I saw this movie last night in 3D - save your money and either wait for the DVD or at minimum pay only for standard non-3D. Special effects were ok but, definitely not in keeping with IM1 or 2. This story revolves around Tony's ability to cope and candidly, was very lacking in substance given the persona they built up for him in IM1 & 2 - very inconsistent and reasoning for it was weak. They could have spent more time developing fewer concepts and made it a greater story but, instead they packed the story and only allowed for very shallow framework behind it. Overall movie was a good action movie but, special effects definitely not worth the 3D dollars charged.
Pros decent special effects, some funny "stark" moments
Cons pace too fast to allow true development, weak storyline