It's a mild crowd pleaser for people who are exhausted by blockbusters.

Watch something else. There are very few redeeming qualities to this film.

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."

The film never slows down or bores, plunging from one harrowing sequence to the next.