Product review (5 stars): Cheap, Easy, and looks like the original
This seems like one of those products you either love or hate because it either works, or it doesn't.  In this case, it works.  The benefit is that it was cheap compared to what I would have paid locally, and I can't even imagine what a plumber would have cost.  This is no brainer easy.  Just pull the tray out, yank off old part and replace.  Pay attention to how it tucks in, but you will still have the other side to look at too.  It seems to be comparable quality as the original Kenmore part.  One of those simple projects that make unhandy people like me feel good about ourselves.