I installed the Insinkerator air switch with this model. Easy install and found the unit to be very quite which makes it seem a top end unit. My wife loves how quiet it is compared to our older unit. I liked the ease of installation. One tip, when locking the top ring to install to the sink, use a large pair of channel locks to hold the disposal sink ring from turning while using the tool included with this model to lock the ring on the disposal. The lock must go farther than I originally thought. Everything is stated in the instructions but for a novice, you must lock the ring over a small like bump in the other ring. It was super easy once I used a larger channel locks to keep the entire disposal from moving in a circle. A plumber would obviously already know this.... not me... LOL