I picked up the Harbor Freight US cleaner yesterday. Frankly, I'm not impressed at all. This thing just doesn't have any power. They claim 160 watts- I say bull- most of that is devoted to the heater. I'm guessing the transducer is around 35 watts- enough to do jewelry at best.
I tried Vinegar, Lemishine, dishsoap, etc. The best performance I got was 50/50 Vinegar and water in a BABY FOOD JAR, with just 20 .223 cases. This did a great job of getting the cases clean inside and out, as well as the primer pocket. I've never seen brass so clean, especially inside the case and the primer pocket. But 20 at a time??? Any more brass just sucks the energy right out of the water. And there is no way this method of cleaning is going to give the brass a "shine"- it looks stained and dull. Back into the tumbler to get that shine back.
I put my 9MM slide in today- it took a LONG LONG time (2 hours) to clean the gunk, and I had to reposition it each cycle to 'focus' the wave motion on the right part of the slide. This cleaner only has somewhat decent power right dead center- everywhere else there's very little power left.
For those that have these- let me ask you something. Put nothing but the tray in a half filled tank, and fire it up. Do you see just a slight hump of agitating water in the center? Now dump 50 .223 or Pistol cases in- see any waves on the top of the water?
I guess I should have known... typical Harbor Freight sub-par performance.