Used to clean pistol brass which it does extremely effectively. Importantly it cleans both the outside and inside of the case - something the tumbler cleaners don't do. Capacity is about 400 x 9mm cases which I used with 600grms of pins and 10-15grms of burnishing powder. I'll alter the ratio of brass and pins for the next clean - less brass and more pins - to see it that improves the cleaning process. Cleaning time 20minutes at No.2 speed setting.
Negatives: Only one - the lid leaks but as suggested by another user, put a 1-2mm small piece of cardboard under contact point and the leak stops.
Overall - 5 Stars - For my purpose, this works perfectly - see photos for how much dirt was cleaned of the brass - and that means I am no longer dealing with chemical residue and dust. A big win in all around!