Cool idea - HATE the found footage conceit.

Tight action thriller that delivers interesting ideas in a confined location.

Just excellent. An unbelievable story, told through stunning re-enactments. Not usually a fan of 'faking' documentary footage, but they never felt staged or forced, and gave such a sense of the ordeal the two climbers went through.

I respect this film, but neither enjoyed it or connected with it. His performance is wonderful, and the famous 17 minute take is mesmerising, but the whole film's attitude is so cold and impersonal to all of its characters that it felt important, but not engaging. But very well made.