Purchased this unit because we are on a septic system. During research prior to purchase, found this model to be highly recommended for applications like ours. The unit was easy to install because we already had an electrical outlet in the under-sink cabinet where it was going and the plumbing modifications required were straightforward. The unit has a two-stage grinding system to minimize particle size and a bio-assist device to further help the septic system work efficiently. We'll know for sure how well this performs when we have our next septic pump-out and get the contractor's report! Also, this unit is considerably quieter than other waste disposals we have had. In fact, when measured with a decibel reader, water flowing from the tap is louder than this unit when it's operating. Also, good value for price.