grivel spiders?

Instep crampons have been around for a long time. Tried them once, and found them to be worthless on icy rock above tree line. Too dangerous to even consider using again.

I have a pair and have played with them a bit but not anything serious. I think they are fine for those icy trail sections or passes that hold snow well into the summer where some extra traction is helpful, which is what I carry them for. I have seen several threads regarding crampons where there is a contingent that thinks you will die in a horrible fall unless you use anything less then hard core heavy crampons, that it is reckless and suicidal to go with anything less. Whatever, I am not climbing glaciers or frozen waterfalls. I think if you use common sense and recognize the limitations of the Grivel Spiders you will live to tell the tale.