Mike, I, too, have owned first a Black & Decker and later a Craftsman 1/2" impacts. I prefer air, not only because they usually have a little more power, but also because they're so much lighter in weight, but the electric ones work just fine. The impact (or hammering) mechanism is about the same in either air or electric, but electric motors are heavier than air motors./w3tcompact/icons/laugh.gif