This was a Christmas present for my wife last year (it was the only thing she wanted). It's outstanding! Very quiet, works like a charm, does the job perfectly, and our septic assist chemical lasted the better part of a year! We live just outside a small town, in an older home (1978), and this product allows us to have a garbage disposal even with an older septic system. We have not had one bit of trouble with our septic since installing this. BTW, installation was pretty simple and straightforward. I highly recommend this product!