Product review (4 stars): Perfect replacement.
I bought this because the house we bought has a waste king disposal, which was missing a splash guard. This product fit my unit perfectly. The splash guard is just held in place by pressure and a small ridge inside the throat of the disposal, and so fit is critical. The stopper also fit perfectly, and holds water in the sink with no problem.

The only con to this item, and the reason I'm giving only 4 stars, is the rubber that the guard is made of seems a bit stiff and plastic-y. In the past when I've seen other units, the guard seemed more supple. It's possible that over time, the rubber will soften and this might not BE a problem. But generally in my experience, rubber and plastics tend to harden over time. Only time will answer this question.