Product review (2 stars): The splash guard is stiff and the stopper barely works
I purchased this for my Waste King L-8000 thinking it would be an exact replacement of the original that I accidentally threw out during a remodel.  I was wrong.  This is much cheaper and does not work nearly as good.  The rubber on the stopper is really stiff and hardly lets anything past it.  I guess this would be good if you were pretty paranoid about stuff falling down you didn't want to, but I think it is more annoying than anything.  The stopper also does a terrible job of doing what it is built to do; stop water.  The stopper is just slightly smaller than the drain of the L-8000, so unless you somehow manage to get a perfect seal on the bottom, the water will drain rather quickly.  Unfortunately, I have yet to find a stopper that will actually fit the Waste King properly