My ´98 XJ has a 33/12.5 15R and I love them. Somewhat noisy at very low speeds but off-road they are excellent. I have a RE 4,5 lift and had to do 'some extensive trimming' to the car.
As Slo-Sho said, they feel at home in the mud, I off-road every weekend and the next tyre I´ll buy will...