Even though it's quite clear from reading the premise that the film is surely not for everyone, that is still an understatement. The filmmaking here is incredibly detached of emotion, cold, and very, very clinical. That's part of the genius of it. A film like this needs to be executed this way, or else wavering too far into one side would be controversial, either being labeled as a film too forgiving of its protagonists and wanting us to sympathize with them, or portraying them as completely evil and not adding enough layers. In that respect the film works. It is mostly without a musical score, and scenes play out in long stretches in ways sure to infuriate many, but also impressive in their commitment. I think it's a fascinating, powerful film, but not an easy one to like.