What they got right: Three seperate stories. It's nice to see further stories involving the movie characters. The pre-armor Tony and Rhodey are a hoot and Paul captures the magic between the two characters well. (Between this and the various Marvel Adventures stories, I'm really liking this guy's work.) Sadly, having not been able to see Incredible Hulk yet (I hate this year), I can't comment on how well it was done. In the last story I can certainly see the "Samuel L. Jackson" version (used because of the Ultimate version of Fury, I'm betting) having his own movie.
What they got wrong: The art wasn't that exciting overall. The Hulk story just seemed flat. I can appreciate it on the concept level, and I can tell Frank tried, but even within the limits of a short story it just didn't work. I also felt I should have been more excited in the Fury story, but I just wasn't that jazzed about it.
Recommendation: If you really like the movies (and I love the Iron Man movie), it's worth getting. However, it's not exactly a must have, even then.