A film with more than the usual spoiler issues. Talking about it in any detail feels akin to handing you a gift-wrapped present and saying, "I hope you like it -- It's a thriller about a diabolical secret experiment."

It's the kind of movie you'll want to see a second time with someone who hasn't seen it yet, to remember what it was like to watch it for the first time.

A great movie, one of the best of this year. There was a bit of confusion at one point in the plot, but nothing serious.

One of the film's great tricks is that, for a time, you think it will go down a rabbit hole of unrealistic glorification.