I caught this one lastnight during the midnight showing at a local theater. I have to say...Jon Favreau does not disappoint. Every character was very well cast. Robert Downey, Jr., who is one of his generation's most underappreciated actors, captured the interesting dichotomy of Tony Stark's narcissism and compassion with a comedic flair. Jeff Bridges, as Stark's mentor/nemesis, Obadiah Stane(Iron Monger), does a superb job as a ruthless corporate titan. Throw in Terrence Howard as best friend, Jim Rhodes and beautiful Gwyneth Paltrow as Personal Assistant, Pepper Potts...and you have an all-star cast.
The action is fast-paced and exciting without overpowering as a crutch for lack of plot....on the contrary, the plot straddles the fine line between realism and the fantastic world of comics. It doesn't ask you to suspend your disbelief, but at the same time, stays surprisingly true to it's comic book roots.
A truly enjoyable film. Looks like the summer movie season has begun...