This is an incredible movie. I have seen a million sci-fi apocalypse movies, and this one genuinely surprised me with its plot twists. The final act is intense and beautiful and fills up your chest without being gratuitous. If you are looking for iRobot, this is not that kind of movie. This is a movie about two kids trying to do something they don't really know how to do, and this movie reflects perfectly the intensity and confusion and deep, deep desire to do it 'right'.