It was okay, not great but okay.
Johansson's character seemed pretty much pointless. Paltrow could have done with more time on screen. If you hadn't seen the first one for a while you could easily forget that she is actually more than just a PA to Stark.
Question: Why doesn't Iron Man have a weapon he can fire when he's flying? Seems a bit odd not to have one.
I was about to say I didn't see Stan Lee in the movie but just checked and didn't realise he was Larry King.