Along with the noise reduction, you'll also find a lower level of vibration/shock. This will help accuracy which is one plus. When hunting that lower vibration/shock will also help you to see where your arrow hits better. For ME that is as important as anything you'll get when dampening a xbow, less noise for me is the side effect.

I know you did not ask about vibration, more about noise for you, but these are side benefits that you get with the lower noise.