I've had two sets of Grabber AT2s.. The first set I put on my KJ diesel at 10,000 miles or so. I spoke to the second owner of that Jeep directly and he told me that he finally had to put new tires on at 90,000. That's about 80K on a set of ATs. Unreal. The tread warranty was only 60K, but he got 80K out of them.
As far as road noise, they are between the average AT and a MT. They do hummmmm but it's not horrible. They do have rim protectors which is nice. You can stud them for use in ice. They do have the "mountain snowflake" symbol on them for severe winter use. I pesonally did not like them in the snow. Just like the BFG KO, the interlocked tread tends to hold onto snow and not bite into the road...therefore they would "push" going into turns and such. I didn't like that. Offroad, they were excellent at everything except mud, for the same reasons. They were very tough tires, but they weigh a little more than the competitors.
For an all-around tire, they are one of the best choices out there for the money. If you're looking for fuel economy, there are better ATs out there. If you're looking for a snow tire, there are better ATs. But for a do-everything in all weather and all trail conditions type tire, the AT2 is consistently good at it all.