I've run TSL's, MT/R's, BFG M/T's and then the Krawlers. To me (and I live in the NW, we get our fair share of mud), they're not bad in the mud at all. They're better than the MT/R's and BFG M/T's for sure... the swamper probably does a little better. The the Krawlers are AWESOME in the rocks, snow, etc. They aren't real good on compact snow/ice, but any aggressive tire like that isn't. I drive my rig on a few trips a year that are probably close to 200 miles round trip and they wear ok for that stuff, just too much $$$ for something that would get driven every day. They aren't any louder than my 35" MT/R's were either and balanced out pretty decent.
J