I've been running them on my Superduty (tow rig and DD) for 2+ years and have approx. 25k on 'em. I have mainly run the BFG AT and MT on past vehicles, and the Bighorn is every bit as good, if not better. I do need to rotate them often due to cupping (and considerable difference in height of every other outer lug) on the tires being run up front. However, thats gotta be mostly the fault of the truck. After rotating, the difference in wear evens them out OK.
Like Kiel said, search for more feedback...