The film was very well shot and it made me feel as if I were on the mountain itself. I really enjoyed the film, the performances worked (they weren't great, with the exception of Clarke, but weren't bad) and the story was surprisingly moving. Clarke was especially strong, he had the most emotional moments, I would have liked to see more of Gyllenhaal's character though, and I would have liked to see more development of the Texas guy so his saving could hit the emotional chords stronger. The film just didn't hit you hard enough on the emotional moments, or create enough tension in the suspenseful moments for it to warrant an A. B+
I also really loved the score as a side note, it was simplistic, thematic, and moving in the right moments. The Epilogue piece is really nice, one of my favorite scores so far this year.