Man, I loved this movie, I stayed up until 3:00 in the morning to watch it twice to really see everyones character clearly,
SPOILER WARNING AHEAD
The twist at the end was really good to me, I hated it though that Katie and that other women died, it was sad but a really good twist. For the entire movie taking place in a dark room, it really made you care for the characters, whom I , mostly loved all of them. See this movie, it definitely made me think a lot.