Product review (5 stars): About time - An excellent fix for a poorly designed product.
It's about time Kitchen Aid released this "upgrade."  The old rack-adjusters were junk.  I replaced more of them then I can remember.  This should have been the design from the start and Kitchen Aid should have issued a recall to fix these at no charge to us customers.

That said, this new rack adjuster works great.  It should last much longer than the old one.  Be sure to view the youtube installation video.  It makes this job a piece of cake.  Do note that the rack positioners are installed backwards in the video as another reviewer highlighted.  Be sure the "smooth" side points to the inside of the rack.

Another note - the screws that hold the axles in place were a bit loose on the kit I received.  A simple tightening made the entire assembly work a lot better.  The axles have small tabs that go into slots on the metal rail so you don't need to hold them in place while tightening.  Be careful not to over tighten as these axles are plastic and you don't want to strip them.