They are worth every penny in very firm/icy conditions, especially when traversing. The Sierra spring conditions in the morning before softening is primarily where I use mine. But I don't use them nearly as often since I got wide skins that are cut to the exact size/shape of the boards. Now I find that by the time I need them I just switch into boot crampons and go straight up.
_________________ If the skinning were easy it would be called telemarking.