I would tend to agree that a stiffer soled boot will be far better than a trail runner/light hiker boot. I used my crampons with no issues with my mountaineering boots, but when I attempted baldy with my lighter weight hiking boot (still a boot, but a flexible sole) I had MAJOR foot issues. My foot was cramping up bad (and lasted for 2 days after) due to the rigidity of the crampon and how tightening it on the shoe made the boot fit. I had blisters with boots I've NEVER had a blister with before due to the crampons.
