Good question. I've worn them for most runs (2-4x/week) for about 6 months on very rocky and steep terrain with lots of bushwhacking, snow, and mud. Unfortunately for you, I use Strava to track my dog Ruby as a pair of shoes instead of my shoes. Best guess: I've run at least a few hundred miles in them. The uppers are flawed as I pointed out and I'm starting to wear the lugs off of the forefoot too, but I've done a lot of 2000' descents on hard-packed, gravelly surfaces. It's funny though, I went for a big trail run yesterday (~15 miles, 4000' of climbing) and still opted for the Scramblers over any other shoe. They are just so fun to run in and grounded, but more built up than the Mesa Trail so there's less fatigue and less cherry-picking through those half-dollar sized rocks which can sting in Mesa Trail. The price is high for the durability, but the experience has been really fun. A tough call for sure.