Nicely made film that looks great, and solid script and performances. The central conceit intrigues right up until you find out exactly who is responsible, and the revelation doesn’t live up to the original promise, and as you think it through, the logical flaws start to be bothersome. In some respects, it’s a slicker version of 1997’s Cube, but that movie at least had the balls to not explain itself – and the explanation here makes the film weaker by explaining the mystery. Still, great first and second acts.