It's hard to tell it is running, it is very quiet. This unit replaced an older model and locked right into the existing connection. The new drain connector was easy to connect to the existing drain as well as the dishwasher connection.

The new drain opening protector is very easy to remove and replace, a real improvement over the older design. Instead of reaching thru, you can just pull it out and have full access. Yes, of course while the disposer is turned off.