I just finished up with these last week. I put them on my 2010 Xterra 45,000 miles ago. I probably could have pushed that to an even 50,000, since the tires were not yet down to the wear bars yet. But, with winter coming, I figured I'd best take advantage of a sale that I found and order their replacements.
Why didn't I order the Coopers again? Well, it's not because they are a bad tire. I just found a set of Falken WildPeak AT3/W's on sale for a better price, and they get good reviews, so that's the direction I went. Remember, I'm an average dude, and not made of money.
As I said, the Coopers were not bad tires. I felt I got a fair amount of wear out of them. I used them on a variety of surfaces, from pavement, to snow, to packed and loose gravel, to mud, to driving in creek beds, through fields, on grass...you name it. They seemed to wear much more slowly and evenly than the BF Goodrich Land Terrain tires that came standard on the X.
Traction was good on all surfaces. Only on my last trip to the farm, which involves driving on extremely muddy tractor roads, was I not able to get in without using four-wheel drive. Other than that, I was able to navigate the old, rutted farm roads in two-wheel drive, even when there was a decent amount of snow on the ground. I always felt the ATP's were very sure-footed and gave me confidence even under poor driving conditions. Even with the very thin tread that was left, the X never offered to hydroplane or spin in wet conditions.
The tires looked good, too. Suitably aggressive without being ridiculous looking. Mine had outlined white letters and they complemented the appearance of the Xterra.
I only had one puncture in the whole 45,000 miles that I had the ATP's. The BF Goodrich's I had before were shredded by nails, screws, and random pieces of metal, probably 5 or 6 times. They definitely gave the impression that they were very thin, and finally one tire was punctured so badly that plugging it proved impossible, which prompted me to get the Coopers.
The downsides were few. Ride wasn't quite as good as it now is with the Falkens. It isn't a major difference, but it is noticeable. And, the older the ATP's got, the louder they became. By the end, they had "cupped" significantly, something that never happened with the old BF Goodrich's.
If you can find these for under $125 (for 265/75-16's), I would feel comfortable recommending them. However when I went to replace them, I found that they had significantly increased in price, and, pending some time and evaluation, I think the Falkens are probably the better deal.