It looks good. The set pieces are cool. Iron Man, when he's in the suit, looks and moves awesomely.
But this film is completely forgettable. There is not much redeeming about the story of this film, nor about any of the characters. None of the storylines come together, and individually they all fall flat.
Too many characters makes for a movie full of nothing. I don't even want to waste too much time writing on this... because this movie had all the makings of something that could have been great... like The Dark Knight to Batman Begins... but falls way short of the first one.