Replaced a KitchenAid machine that froze up after 5 years of use (disappointing). No, there was NOTHING stuck in the unit. The InSinkErator was installed very quickly (all plumbing matched) and runs so quietly you forget to turn it off. Hopefully, it will last past the warranty -- not a given in today's world.
I bought, but did not need or want, the remote air-operated switch. It required that a large hold be drilled in our Granite countertop.