After researching reviews and comparisons with snap on etc, I bought a Harbor Freight Earthquake XT a couple years ago and it has worked flawlessly. It has 3 torque setting and on the highest setting I have actually cracked the steel under the nut on an assembly I was working on (not a vehicle). I originally bought it because I had an old trailer that the lug nuts had rusted to the studs. Even after using PB blaster I couldn't get them all off with a breaker bar. This impact removed them all first try. I know some HF tools are junk, but this is one I give a thumbs up for the price. A pretty good deal when they are on sale/discount coupon. I've use a couple of different electric models and while they have their place for some projects, I've never been impressed with the torque or battery life considering the cost for the good electric ones vs air.