Saw this today with my kids, was very impressed. Okay, I'm easily pleased by any Marvel film, but this really was a strong film.
Well paced, visually stunning, great balance of characters' screen time, fair plot, really cool look and feel to it all making it feel like a real superhero film.
Liked the humour being understated and part of the characters (Tony Stark and The Hulk were great with this) but there being a lot of it, made the film have more to it and also gave identity to the characters.
A big thumbs up!