From someone who has had General Grabber AT2's, I would highly recommend them. I ran them in the 265/70/16 size on my Tacoma and never had any problems with them. I sold the truck to my dad and he still has the tires on the truck, now at 56,XXX miles and they still have tread.
I can attribute the high mileage on them to keeping up with rotations, proper inflation and normal driving. In mud they did just as well as the BFG TA/KO's and GY Wranglers i've owned. In the rain they were fine, I drove 55 miles each way, everyday, highway for the entire time I owned the truck, no problems.
Honestly, unless the person has owned them or seen them in action, I think you're going to get more negative criticism than not because they are just a "General" tire and people are going off untested "i know someone, who know's someone" stories. The only downside I found on these tires is the tire weight, they run heavier than most comparable tires in the same size...usually 3-7 lbs. more per tire. On the upside you get more tread depth with these tires.
Hope that helped, good luck.