It was EPIC. The acting, casting, story and special effects were terrific.
I was worried that Tony's life altering experience would make him a pussy, but he shot-up the terrorists real good! I'm glad that this one didn't turn into a hand-wringing cry session about the value of life and not killing, and all that bullshit the Batman writers (and most comic book writers) would go on and on about. I'm also relieved that the movie didn't become like Fantastic Four 2, with their anti-US military spin.
Some blood and guts killings would have been nice, but I understand a "R" rating would have hurt the box office numbers.