The Naxo ski crampons enabled me to skin up nearly all the way to the top of the Breithorn in Switzerland. Skiers without crampons needed to leave their skis at a lower elevation. The crampons are lightweight and seem pretty durable. They easily cut into hardpack and give good bite on moderately hard ice. The main drawback is that you need to take your ski off to attach it. Silvretta crampons can be attached while the boot is still in the binding, which is convenient when you are on the steeper slopes.

It worked okay, but it wasn't easy to put on and off when it got cold. Once it released and pushed back to the end of the binding which rendered it useless. And of course, the most important issue, on the highest climbing setting only the first point hit the ground. The ski crampon did make a difference while climbing, and I believe I made it up things which would have otherwise required a boot pack. You'll have to decide what it's worth to you.

The crampon is a good idea, but it's just not wide enough for the width of skis coming out in years to come. I purchased the fastest crampon (105mm) and attempted to fit them to a Volkl Sanouk. I had to do some serious bending to alter the crampon and make it fit around a Sanouk (112mm under foot). I don't recommend bending the crampons out any further because they're bit in the snow will be slightly less effective. Other than that, the crampons do their job, except when climbing in the steepest position, only the front teeth bite the snow.