Ya i bought the Mastercraft Maximum impact wrench and used it to change the winter over last week. Worked perfectly, even with the horribly overtorqued lugs nuts courtesy of my Toyota tech. They always torque the living hell out of them on me and i endup haveing to struggle with a breaker bar to loosen them.
The cordless impact wrench went right to work on them, came off like butter. I have been really impressed with it. My father was laughing at me when i bought, saying it won't be powerful enough for anything useful. After seeing it and using it himself he went out and bought one too.