I had 2 sets of Grabber AT2's. The first wore like iron, had great traction off road and in the snow, and worked great in the sand. They were relatively quiet, drove smoothly, and were cheap. The second set, same size, same Jeep KJ, howled on the road, were impossible to balance, and shook the steering wheel. This was all four of them and there was definitely something wrong with the manufacture. I would have returned them but I ended up trading the Jeep in.
In terms of sidewall toughness, I was t-boned by a low riding Honda that hit me hard in the back tire hard enough to push the Jeep sideways. The Honda bumper was shredded and there was no damage to the tire other than a scrape around the circumference.
I currently have Cooper AT3's and Hankook ATM's in similar sizes on my Jeeps. Both tires are more civilized on the road and just as good in the snow, priced similarly, and are almost as good off road. However, I really liked the aggressive look of the Grabbers and would consider buying again if I knew I was getting good ones.