Honestly I wasn't much of a Rob fan, but then at one scene he actually looks really great! And I think he definitely got the crooked smile down, exactly how I imagined Edward smiling!!!
But when I drag my dad out to watch the movie w/ me, he said that he didn't get a lot of the parts if I didn't explain to him afterwards. So if you haven't read the book, read it before you watch the movie!!! Or else you will not get a lot of it