Literally just got back from watching. Really is a great movie. If anything it could have had a little more downtime as there's very little; it's a huge action roller-coaster, bit it never reached the tedious "I'm bored of things smashing eachother now" feeling I get in films like IM3.
The action is fantastic, the fighting looks real and brutal- Black Widow is less Buffyesque in her fighting and even Falcon seems more of a badass in this film. The hanger fight starts well but then half way through, when giant man appears, it just becomes jaw dropping.
Can't wait to see it again
ZEMO isn't the same Zemo from the comics, but I guess it could start towards an origin for that. He's not in the film much, but at the same time his methods and motivations make him a far more interesting character than hammer or whiplash for instance. At the end of the day, he wins, his plans near faultless. He destroys the Avengers. Not many villains can say that.