Product review (3 stars): Must be trimmed to be usable. Rubber deteriorates over time.
Bad design, stiff material slows water flow too much.  Original splash guard had the same problem.  I tried modifying the original but removed too much material and it no longer contained the bits of food thrown by the disposer.  I bought this to replace the original I ruined and I cut off less of the points to improve water flow.  There is still a backup problem but not as bad as it was.  However, after 18 months a new issue has arisen.  The rubber has started to decompose.  When I touch the splash guard it now leaves a black stain on my fingers.  I guess I will order another of the same.