This may be a great film, and an ingenious film, but only if you've the stomach for it.

Any film that relies on one actor to carry the movie demands a lot of its leading man but James Franco applies a youthful exuberance that makes him so watchable it's all viewers could do not to blink.

Franco... delivers a solid performance as the strapping climber who shows his vulnerability when he reflects back on his life--the mistakes he's made and the moments he may miss.

Both tremendously anxiety-inducing and life-affirming over the course of its run time.