I came from the "old style" left and right Kohler BASKETS that were also rubber coated.  I had to get rid of them as the rubber was wearing off and they looked dreadful!  At first I felt like I had to kind of work getting the rack to be "balanced" on the four rubber holders inside of the sink, and I was a bit worried that without the rubber coating my sink would get scratched,  but now I take it in and out and don't even think twice about how to get it "balanced".  It fits snugly and is super easy to use, and no scratches from the non-coated finish as the rubber holders are thick and protect my sink (as well as hold the rack nicely in place).