So far the High Sierra cranks have been great. I have about 600 miles on them now, mostly on the 130mm setting. Not a lot of offroad yet, but it looks like I may be using them in the Moonride next week which I hope will result in lots of miles!
The extra width seems to be no problem and they are so well made that they don't loosen up: the length adjustment or the bolt that attaches to the hub. All in all I am very happy with them - will give another report in a few weeks after some offroad.