I've worn 505s for decades; usually they last well.  I bought two medium-stonewash pairs about 2 years ago, and in both pairs after a few months of ordinary wear, the rear belt loops tore out of the fabric (didn't come un-stitched; they left holes in the body of the jeans).  Not the quality I expect from Levi's.  On the other hand the sizes were as expected (and the same), unlike what some other reviewers have found.  Both pairs say "Levi de Mexico", but "Made in Lesotho", which is in southern Africa.