Im running Baja Radials. Had them for 3-4 years now. They work great in sand & dirt. I havent had them in super mucky mud, so dont know how well they work in mud.
They work ok on the highway but IMO, wear too fast. I have less than 10k miles (probably closer to 5k) and they are 1/2 way worn or more.
One of the other keys to the M/T tires is Tire Pressure. I was getting some nasty worn edges at 32psi. I called M/T and they said not to go over 28psi , so I set the tires to that and havent had any more issues.