A pretty fun and disorienting puzzle, though it never live up to the great opening scene. This sci-fi horror frustrates almost as much as it fascinates. It plays out like most sci-fi films out there, with multiple situations that seem dissonant and you try to figure out how these are interconnected. I find the characters quite compelling and the unsettling score raises the tension level through the roof. However, it starts to drag in the middle, the mystery gets gradually convoluted, and ultimately becomes less interesting. But also like most of these films, it builds up to a satisfying conclusion and thankfully because of the ridiculous amount of tension this film generates, I'm still around by the time it gets there. It could have worked a lot better but overall it's still a fun watch.