I really love them! They do well off road and get rid of dirt/rocks quickly, and they're so quiet and smooth on road and do well in slippery conditions. Better than the Dunlops that came on the 200, and BFG's and Toyo's that I've experienced before. The sidewall and tread design is great too. They've been great for the past year.
I have a 285/70R17 set on 17x8.5 +0 wheels.
I wish it came in a taller but skinny size though, which is leading me to look at the Falken Wildpeak AT3W and Cooper Discoverer AT3 XLT in 285/75R17 or the Kenda Klever R/T in 35x10.5R17 as my next tire choice. All 3 of these seem to be in a similar category of being aggressive off road with great road manners, and come in the elusive tall and skinny sizes.
If the Grabber ATX came in those sizes, I would definitely go for it again - it's my favorite A/T on the market currently.