I have/had 2 sets... one set on my '91 525... got about 15k on them.... probably get another 25k out of them. 2nd set on a 2000 maxima I just traded in on a Tahoe... had 24k on them and they had quite a bit of tread left of them.

I know quite a few people had problems with them cupping on the sides. I have had great luck with both sets.... nice smooth, quiet ride... and they grip pretty well.