My boots are in serious need of repair after only 400 hours of wear, half of what I was hoping for when I purchased them. The sole is doing reasonably well, but the stitching is coming apart and the leather is tearing.
Definitely less durable than their 7.5 oz leather loggers, but on the up side they were far more comfortable and the break in time was shorter.
I also found the calf and heel area of the boots offer too much room compared to the toe, which I suppose must have affected the durability. It's why I'm not rating it any lower than 4/5.