Product review (2 stars): Very dissappointing.
Very disappointing.  It is flimsy, doesn't protect much from splash, and doesn't hold it's shape.  Wears out quickly and seems to amplify rather than reduce the disposal noise.  I thought this soft rubber design was the only thing available for my 10 year old Sinkmaster disposal.  Not so.  There are more rigid rubber choices such as the General Electric WC03X10010 which is a direct replacement and works better for my money.