Saw it in the UK this morning. I'm a Marvel geek and have seen all the movies multiple times.
Basically i recommend anyone who is undecided or not bothered, should absolutely watch it. In 3D - best 3D Marvel film (by far) to date. You won't be disappointed whatsoever.
Very funny, and also best special effects so far by a long way. Mid-credits scene wasn't worth watching though.
Was it better than Cap 2? personally...i think just as good.
Thanos finally gets shown (and speaks) - and wow he seems like a real badass (calls Ronan "boy" LOL) - leaked Thanos picture http://instagram.com/p/rGkvqzzR7Q/?modal=true
[b]NOW GO SEE IT![/b]
(then come back and tell us what you thought)