It was very... real. At least it seemed pretty real to me. Well-researched. Did a fine job of not politicizing the events. What's also nice is that there are no overblown heroic moments that you might expect in a Hollywood movie. Pretty much a straight shooter.
I had forgotten that the blackbox cockpit recorder "showed" that the passangers made it into the cockpit, so when they were bashing on the door, I was wondering if they'd make it. And I like the way it ends -- no explosion, no aftermath, just see the ground out the cockpit window, black screen.