I have a hornaby ultrasonic cleaner and am very happy with it. It is quick, compared to tumblers but you won't get the same shiney brass as with a tumbler. I run 3 to 4 cycles at 6 minutes, I then put the brass in a bath of warm water with baking soda in it ... then give them a quick polish with a paper towel and they come out looking pretty good. If you don't rinse with water and baking soda they tend to tarnish a bit.