I've been using one for years. I started out using the stainless pins that came with the tumbler. Never had an issue with pins sticking in the case, but the pins are all random lengths. Some of the shortest pins were just big enough to wedge sideways in the primer pocket of anything with a large primer. I got in the habit of inspecting each case...sometimes I'd have half a dozen in a tumbler load that I'd have to remove with a small pair of needle-nose pliers. Got tired of that game, and switched to Southern Shine media. It's stainless chips, quite small, and I've never had any of it stick in cases, ever. Great stuff! My process is to fill a RCBS rotary media separator with water, and dump the brass and media into that. A few revolutions of the separator, and all of the stainless chips fall into the bottom of the separator. Dump the now clean brass into a towel to get most of the water off, then into the dehydrator. Process works great for me.
One tip I learned a long time ago--you can get brass TOO clean with just Dawn and Lemishine. So clean that it could be difficult to seat bullets. I switched from Dawn to an automotive wash-and-wax soap. It leaves just enough of a film on the brass that it doesn't quickly oxidize and get tarnished, and it makes seating bullets in the shiny new cases easier.