I got tired of my brass being all dusty, dust flying up all over the place when I was transfering my brass around. Dirty brass inside, cleaning the flashholes sucked. Non of the applies with the SS tumbler/meadia. I finally upgraded a few months back and am so happy.
If you need to start out with a regular vibratory tumbler, they do more than you prolly need, and im sure you will be happy with them, I was for many years, and so were most of the people that now use the SS!! Good luck.