I installed one of these flanges in a previous house, and Kohler's finish lasts a lot longer than any other flange or basket strainer.  I assume that this one will be the same, though it's too early to tell.  With that assumption, the reason that I'm only giving 4 stars is because the "Oiled Bronze" finish is grayer than the finish on my Kohler faucet.  If the finish on the flange doesn't hold up as well as my previous one, I'll update my review.