Pretty good movie overall. First half was nothing special but it got better as it went along.

It was OK. I don't see why everyone loves it so much. It wasn't very smart or deep or well-directed.

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."

A movie that not only functions as a solid scarefest but a razor-sharp satire.