I've had mine for like 25k miles, can't really tell there's any wear, size 285/16. For me, 5 tires was less $ than 4 tires of most other similar aggressive AT tires. Like said, they seem quieter than KO2s that everybody, their brother and their whole neighborhood are running these days. We like them significantly more than the Duratracs they replaced - improved steering feel, improved road handling in turns, quieter, braking seems slightly improved too - guessing mainly because the DTs were so "soft".
I did have to have a warranty claim on one tire that got a nice crack in the sidewall after hitting a giant pothole at freezing temps going over speed limit with a rig loaded for a week of vacationing. Still held air, but from then on decided it's worth always having 5 matching tires, especially for a full-time 4wd rig.