Bought to reroof a garage. Put about 4000 nails with no problems. Slightly lighter than some of the others, which is nice when carrying it on the roof, and I had no issues with misfires or double fires. Can't speak to longevity as I doubt I'll ever use it close enough to wear it out, but I'm happy to buy my own tools and I find this is probably a good tool for most people who do roofing work want to do it yourself.