Great acting all around. Special note should be made of Robert Downey Jr.'s performance; it is what makes the story compelling beyond the special effects. The well-written script equals the intensity of "Spiderman 2" but shows a more mature heart. It's good to see a character choose to become a hero without all the angst-riddled self-doubt that has plagued other recent Marvel fare. In my opinion it rivals "Batman Begins" for best superhero film of the decade so far. And it's the first movie since the return of The Dark Knight in that aforementioned film that had me saying to myself as I left the theater, "I gotta see that again!"