Product review (4 stars): We love it, now that it's installed
Quiet, powerful -- we love this.  We've had no problems with this after a year of use.  It is so quiet -- we have an open kitchen, and we can run this without disturbing conversation. If people notice the sound, they think it's the dishwasher -- amazing!  Be aware that it is really large.  Our house was built in the 1950s, and the pipe for outgoing water from the sink drain is maybe a foot higher than the floor.  The bottom of this garbage disposal was lower than the pipe in the wall, and we had to hire a plumber to install this and ensure that it wouldn't get backed up.  Also, check closely for missing parts before installation. Ours was missing a small component, which KitchenAid was willing to quickly ship for free.  Between the special installation and the missing component, we had to wait awhile to use our kitchen sink!  We were second-guessing the purchase and hemming and hawing about whether we should possibly have purchased one of the compact, but louder, disposals.  But now that this is installed, we couldn't love it more.  We have an open kitchen and this thing is just unbelievably quiet.