I was tremendously impressed with this film. It is a sci-fi film, but it was psychologically realistic: about the Quisling humans willing to collaborate with the alien oppressors, and about the insurgent uprising. The latter were ordinary people who stepped up to tremendous responsibility. They were scared, but did their jobs competently. None of the gratuitous drama a lesser movie would have inserted. And the ending...this one will stick with me for a while.