I just watched this movie yesterday. I thought it was a decent movie with very good effects. Robert Downey Jr was pretty good. However it was not as good as transformers.
Loved it, up there with Batman Begins for me as a movie of it's ilk, Robert Downey was class in it, made the film I think, and I can't wait for the next one.
Went and saw it the other week, great film. Downey Jr. is very good, I like the arrogance he has, makes a change from all these modest superheroes, great ending where he just admits it.