I was lucky enough to get time off to go and see this on UK opening day - along with a bunch of other adult comic book nerds who probably called in sick!
The film was never going to live up to my hyper-inflated expectations since I've been dying to see it for the nearly a year, but that said it's still an awesome movie. There's great dialogue and lots of impressive action. I wish that Thor'd got more face time since he's one of my faves, but for the number of superheroes they had to squeeze in, it's very well balanced.
There's only one real surprise, which I won't spoil now, but if you know anything about Joss Whedon and how he can (mis)treat his characters, you'll have an idea what to expect! What a shame!!!
What I do love is how Joss looks after his own. I spied Alexis Denisof's name on the credits!