they are OK. I have them in 32x11.50x15.
Good highway manners for a MT, decent wet performance, quite at first, but get noisy as they wear. I would say they have decent mud performance, clean out quick and keep you moving, but lateral traction is crap and they like to slide around...a lot.
The tire seems prone to chunking if you cross a lot of gravel and desert trails like I do. When airing down, I notice that they have a very stiff side wall for a radial (has something to do with the Armor-Tec side wall I'm sure) and don't seem to deform all that much even when aired to 15psi. As for milage, I have about 35k on them and would say I have maybe 10-15k left in them before they are dusted, so they wear pretty well, but need constant baby sitting and rotation every 3k to get it.
I've run BFG All Terrain, BFG Mud Terrain and Nitto Grapplers and would rate them about the same as the BFG MT's.