I use one for gun parts. Does a great job of loosening most of the crud, although post-bath scrubbing is still required. Fouls out the solution fast, not sure how many cleaning cycles I get. For brass, I still use standard vibratory cleaners which do a great job. Recently started experimenting with washing out the media, and sun drying it in racks. Seems to rejuvenate it quite well, although I'll either need to increase drying time or give it 30min in the oven to remove the moisture.