Product review (4 stars): Quieter and more powerful than old disposal. Quite enough ...
Quieter and more powerful than old disposal.  Quite enough my wife thought it wasn't working right.  Install was a bit of a challenge.  The twist into place was extremely tight (making it hard to keep lined up with pipes); and does not have a positive lock click or snap feel so I wound up bending the mounting ears before I decided it was tight enough.