On my way to wearing out a pair of Camp Fours (normally buy Sportiva). Great rubber, pretty stiff, but the older they get, the worse they seem to fit me. Doesn't make sense. I want to buy another pair, but they hurt too much in a couple spots. Maybe I'm getting bunions. YEah!
If they feel good on your feet, and you can find a sale, buy them. Not sure about crampons, but for friction on slabs/smearing they are amazing. Was all over the Sierras in them last summer/fall, mileage ranging from 10-28ish, pack weight 20-35lbs. Climbed up to 5.9 in them at 14,000 ft, and I'm an average climber.