I've been using this hammer for about three months now. I don't use it every day, but enough that it wears me out. It works exceptionally well. From ball joints to rusty fasteners, I've found few things this hammer won't break. My biggest complaints are that the spool seems to spin very easily and when using a hammer the spool slips off the bit after a few seconds of use. But for the price I haven't found a better and more reliable air hammer.