I am about ready to replace a set of 245/45/17 Proxes 4 which has been on my 92 R/T TT at around 4 years. If I could remember when I got them, I could tell you how many miles I put on them. I can tell you this much. They seem to wear better than my old Pirelli all season and Dunlop Supersport all season. I drive them year around in Michigan weathers with snow and cold. Lost control once last year in a slush storm, but the tread was down to 3 or 4 32nds, so I blame myself for riding them so long, not the actual model of tire. In fact, I priced a replacement set at Belle Tire a few months ago, then just toughed it out for the winter (drove more carefully), and am now just wearing them down for the summer, and will get new tires before the snow flies.
My outside corners are wearing down faster than the main tread, but I think this is typical? No cupping like the Pirelli's - very even tread wear. I don't think they are noisy -- not quiet, but not loud, either. As for life, the original Gatorbacks lasted about 40,000 mi, and each of these 3 replacements (Pirelli, Dunlop, Toyo) are more like 20,000 apiece. As I drive less than 7,000 mi per year, every 3 to 4 years is fine by me. If I was better at keeping my tires properly inflated, I am sure they would last a little longer.
Bottom line, if you think you might like them, give them a try. I won't recommend against getting them. And, as everyone else says, YMMV
