I am wondering for a little clarification or just sharing of opinions.
I've owned and used the boot (Mammut MT Trail XT GTX) for the past 4 years (almost to the day) and I've found it to be a fantastic boot for anything in the more serious walking and any winter walking categories that I've done.
I'm wondering how far down the Winter Mountaineering path I can push them. Walking carefully in them I'm currently using a C2 Climbing Tech Nuptse 12 point crampon which I feel is towards their upper limit. Does anyone else use similar or the same boots up to a similar level (Winter II) with a similar crampon set up.
One important thing to point out is the XT part of the typically long name. As far as I can discern from reviews this equates to a raising from B0 to B1 in most reviews. But to my uneducated eye the sole is stiff enough to warrant a C2.
I suppose you best bear in mind I'm of the opinion people 30 years ago climbing far harder than Winter II had about the same gear so hopefully I can bludgeon my way up chumming along happily.
I own a pair which I use for winter walking and scrambling up to about grade I with a pair of Grivel G12s. I think they would be OK on mixed grade II ground, but climbing ice would be much more enjoyable in stiffer boots with more ankle support.
In reply to Mark Bull:
Cheers for the advice, glad to see I'm not the only person using something more than the Grivel Monte Rosa's as crampons for them. I'll see how I do on the grade I and II and see from there!