I have had this tire on my Z 71 for a bit over 2 years and 26,000 miles with no issues. They replaced a set of Bridgestone Dueler A/Ts that came from the factory and were replaced at 45,000 miles. Ride comfort on the Firestones is good and they are not noisy. Tires appear to be wearing well. I keep my tires at 36 psi, have the alignment checked twice a year and rotate the tires every 4 or 5,000 miles. I have had no issues in heavy rain. The times I have driven in snow the 4WD, limited slip and 300 pounds in the bed have definately helped, never had an issue. I have felt the truck spin but it keeps moving. Normal snowfall is 2 to 5inches and traction is good in that. Although the winter of 2010/11 had us get hit with 2 blizzards and we had 19 inches during the first one. I was able to get around, very slowly and at one pont had to make my own road for a short distance. Ice, well, what helps in that?? I go slow and have made it through so far. I can't comment on mud/off road as I don't experience much of that. I will definately consider replacing this set of tires with the same thing when the time comes to replace them.