Quieter than some I've used in the past. Inflated 18" tire from 32psi to 40psi in less than 1.5 minutes. Shuts off at .5 lbs higher than set for to allow for some air loss when unscrewing hose from valve stem. My fingers slip alot on the hose fitting (turning it on to the valve stem). I'm going to coat the fitting with silicone sealant so the surface will have a rubberized grip for my fingers. Small and compact unit. Nice that it has a built in light.