Joseph Gordon-Levitt is amazing, speaking volumes with his eyes and face. When the movie started, I did not think I was going to enjoy it, but 20 minutes into it I couldn't take my eyes off the screen. The character of his little sister was a bit contrived.... didn't buy into that, but other than that I loved the movie...
Sean Penn is amazing... and the rest of the cast makes for some impressive acting. The mixture of actual documentary footage lends a great deal of credibility to the story. I will see it again... and then again...