Good concept, poorly executed.

Go in cold, and you're likely to emerge with your blood boiling. This has to be seen to be believed.

I think this is a new genre that they're all sort of working their way through it and haven't got all the kinks worked out yet but it's a genre that works for me.

The movie's not perfect, but it sticks the landing of its message. It was engaging - thrilling at times - and I personally thought it was a great time.