It's not great by any means, but it's a pretty good movie that didn't leave me filled with regret for investing time in it.

As somebody who had not heard any of this before, it became a curious phenomenon to sit and watch a film and slowly have the realities begin to click into place.

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 best films of this genre always show a path and provide a takeaway for being a better person.