It was awesome. I really liked Stan Lee's obligatory cameo.
Spoiler Below I liked the foreshadowing of War Machine when Rhodes considered donning the Mark II suit. I wasn't too thrilled with the public reveal at the end. Iron Man's public identity may have worked out well in the comics when it happened in 2001(?), but I was kinda looking forward to seeing how the bodyguard thing would work out in this day and age.
But that's a small nitpick. It was still awesome.