I'm currently running E-rated Mickey Thompson Baja Boss AT tires (315/70 R17) on my Power Wagon. I've only had them since mid-April, but am really happy with them. The tread design is more like a Mud Terrain tire than your typical AT tire. They are great on Moab slick rock, and on rutted dirt roads. I have run a handful of trails rated "moderate" by OnX Offroad, and these tires are great in the rocks. I air them down to between 22-28 psi depending on the trail. They drive great on dry tarmac, and I don't think they are loud, but that's subjective. They seem good on wet roads, but I haven't tried to push them on wet roads (its an HD truck). No experience in the snow. There was one day in Moab when I drove them in mud - just to get into a campsite. It was that super-fine Moab sand turned to mud, which is like wet clay. The tire instantly caked-up, and I was sliding around. You've got to spin them pretty good to throw off the mud. No AT tire does well in mud, but I thought these might be a little better given the tread design. But that wet clay in Moab is tough to deal with. We live on a long dirt road, and these tires have big lugs that hold a lot of rocks.
I thought the original KO was garbage, and that kept me away from BFG for a long time. After a lot of research, I tried the KO2, and eventually put them on three mid-size trucks: the C-rated version on a 1997 Tacoma and a 2019 4-Runner, and the E-rated version on a 2017 Tacoma with aftermarket suspension (smoothing out the heavy tire). I've heard from a couple of folks, however, that it was not great tire for HD trucks, and that they wore out really fast.
Pros: On midsize trucks it was light for an E-rated tire, and quiet for having a relatively aggressive tread (for an AT tire). It was really good on washboard dirt roads, gravel roads, and on rocky trails. The E-rated version had super-thick sidewalls (for an AT), and it climbed rock really well when aired down. Holds small rocks and then hucks them when you get up to speed.
Cons: terrible in mud, but so are all AT tires. Some people complained about it on wet roads, but mine seemed fine. Living at over 8,000 feet in Colorado, we run winter tires, so I don't have a lot of experience with it in snow & ice, but I have driven it some through the snow, and it was pretty good. Late one April, after taking off my snows, I drove for three hours at around 10,000 feet on icy roads with a little snow cover, and was pleasantly surprised with the traction provided by the KO2.
The KO3 is supposed to be better on wet roads, and has some other improvements. I think this guy is the best tire-reviewer on the interwebs. Here is his comparison of KO2 vs KO3: