Summary: I had a kitchen aid disposal for 35 years. But I didn't care for the new unit at all. The stopper was awkward and difficult to use to get the unit going. Also, it was installed in such a way that the electric tubing negated half the space under my sink. This wasn't even visible on the old unit.
Summary: Purchased to replace an older model Kitchenaid food disposer. This until is much quieter and does the job but the sink clogs up much more frequently with normal use. Disposer handles the job well so I just have to use it more often than the older model.
Summary: This is the quietest disposal I have ever seen. With water running, one can barely hear the disposal. Performance is not as good as my previous Kitchenaid that recently died - has smaller batch capacity, takes longer to grind, the stopper tends to accumulate debris.