I have the Edelrid crampons (Grödel 6-zag) in snow and ice, and I carried several times in rough, steep terrain and am very convinced of the processing and the surefootedness. The belts are of sufficient length, which should fit on each shoe. The iron is, when properly attaching and lacing really acute moderate the shoe. You could improve only the increase / stop point for sales. There would be an adjustment, still attached in addition, a great advantage. This Erhöhung- and anchor point for the shoe heel is expressed with me easily in the rubber this paragraph.