Don't worry, it is much better than The Alps. And even though you already know what's going to happen, it is easy to get lost in the struggle and enjoy the film. The filming is great for the climbing scenes. The romantic parts or the parts where they make Kurtz and Hinto out to be not-really-bad Nazis are obviously the producer appeasement.
But still, I enjoyed Joe Simpson's Beckoning Silence on You Tube even more than Nordwand and only wish that one could be seen on the big screen. The scenes on there of the traverse really show you a thing or two.