Both of my air ones are Campbell Hausfeld. The cheap one and the better one, Neither have let me down but the better one was supposed to be a rebuilt one I bought years ago at a swap meet and it turned out to only be a defective returned one. It works great but the F/R button is very picky and is hard to push at times and judging by the bash marks on it that's why it was returned.

I have two plug in electric ones, one at home and one at my shop and they get used more then the air ones do. I'd love the convenience of battery ones but I don't use battery tools enough so I always end up having to charge batteries when I use things.