The Quiet Collar baffle on my Evolution Excel is a great new innovation compared to previous baffles that were not removable. It muffles the noise of the disposer, which is great as I prepare food and clean up the kitchen. I especially like the fact that I can take it out and clean it by hand or throw it in the dishwasher. This really helps to reduce some of the smell you get when food particles build up in the disposer.