I would rate them a 9 out of 10.
I have a set of 32x11.5x15 Super Swamper SSR's, and here is my review...
I have been very impressed with these tires. They currently have 25,000 miles on them, and have enough life to go one or two more seasons. They are quiet on the road, and handle more like an all terrain tire. I run them at 50psi for less rolling resistance. There is a guy that passes me on the highway daily, and I can here his bfg mud terrains over the swampers.
They are great offroad and on. The only flaw I have found is the wet weather traction. They spin fairly easy on wet roads.
Here is a pic with the high milage, I'll try to get a cleaner pic of them.