I have run the Dakota M/T's in 31x10.5 since February. They clean out well in the mud, never played hard on the rocks, couldn't find any sand. They do quite well in the snow, they are on my DD. I haven't been stuck with them and they have been in some slick mud with the gas tank dragging. I have no complaints about traction or road manners at all, I have put 12K miles on them and they are easily half dead. I rotate, monitor tire pressure and don't drive crazy with them...65 tops on the highway.
The warranty is a joke. It cost me $94 for a replacement UNDER WARRANTY for a tire with 12/32 left on it. Mind you, a new tire was only $99. They screw you for labor and installation. They wear quickly, you will never get the 40K miles they are rated for, and when you make a warranty claim it costs just as much as buying the tires the first time around. I would steer clear of them if you use for a DD. Consider yourself warned.:scottm:
My brother runs them on his XJ as well and is disappointed with the treadwear on his- he has far less mileage on his though.