Gearhead has a good point here: the light-weight aluminum ones they sell at PMS are good and the weight saving's a definite plus if you are looking for some crampons for general ski-mountaineering. However, those are hinged crampons and when I have tried real technical climbing with telemark boots and flexible crampons I have been very unhappy with the performance. For steep water ice and mixed or technical rock climbing, I use completely rigid crampons with vertical frame bars (I have Grivel Rambo's), and they turn my Scarpa T-2's into a fairly decent technical boot (the forward cant and the high cuffs are less than ideal, but overall they work pretty well). I am sure I will destroy the crampons if I try to use this rig for expedition climbing or even if I just log a lot of miles on them over a number of years, though, because I think the rigid crampons are not designed to be used with flexible boots.