I will skip the size thing as it has been covered for my 33x10.50 KO2s on 60 series wheels. I will add some observations in the "how they are holding up" category.
I have put exactly 30,819 miles on these tires as of today. My 62 is 6,000 lbs as it sits, and 6,800 loaded for trips (roughly 1/3 of those miles). That includes commuting, a couple cross country trips, lots of wheeling back in Washington, wheeling at 2 Solid Axle Summits, and the SSS. I also have a Spartan rear locker which accelerates tire wear.
I measured them with a tread depth gauge tonight and got 10, 10.5, 10, 10, 8.0 (32nds). They start out life at 15/32nds.
This works out to about 4,700 miles per 32nd for each installed tire.
I have done a 5-tire rotation 3 times since install, at 8,419 miles, 16,897 miles, and 25,453 miles.
If I were to run them down to 3/32" of tread depth (the wear bars), I can expect to replace them at about 69,800 miles (using all 5 tires). If I only had 4 tires this would become 56,000 miles. Obviously off road use may dictate replacement sooner, but it's a point of comparison.
Here is the best tire:
And the worst: