Brilliant acting by the 2 teenagers. I rooted for them throughout the story. The set design made it look like they were really in those places, and not sets. Or, were they even sets? I think Mark Ruffalo is a great actor. He should have not even tried using an accent. Often the accent would come and go, kinda spoiling his performance a little bit. Same with Hugh Laurie. But Louis Hoffman was spot on with his dialog. Does he really have a German accent? The scenes of destruction were spectacular, how did they create those scenes so realistically? No spoilers here but I felt the ending was perfect. Nothing was left hanging for me to wonder what happened.