First, the story was about being lost in Nepal, near Everest. This film was quite clearly NOT filmed in Nepal, rather, somewhere in North America (clues: the type of trees, the tree line, the look of the mountains). This might fool someone who has never left North America, but I found it a bit insulting. It was hard to take the film seriously after that.
Second, all the 'good guys' were Americans. The 'bad guy' wasn't, he was Nepalese. Please. Apart from a couple of token Nepalese, everyone was American or at least white/Western. This could have been the case (it's based on a true story) but I doubt it. Again, the credibily of the film diminishes further.
Third, was there actually a climbing/mountain advisor on the film set? Please tell me there wasn't, for his/her sake. The snow holes were palacial (no one would build them like these), some avalanches were occurring on slopes where they wouldn't occur, tired hikers 'racing' up the mountain (they should have been tired and weak at this point), and in one scene a woman follows a group of hikers in the valley in order to raise the alarm, but in the next scene she's hacking her way through 2 feet of virgin snow near the top of the mountain again. This last point is an editing failure. After this, there's no credibility left, for me.
It was derivative, third rate tosh. If you want to see how a survival mountain film should be made see Touching the Void.