Primer pockets get clean in mine, due to the size of the transducer in the home USC, they aren't for big jobs, but done right they'll clean the brass good as new, inside and out, they just don't polish the brass, a tumbler/vibratory and media works best for that.
I've been using an ultrasonic cleaner for my brass for several months now and am real happy with the results, I'm not a high volume shooter, so this method won't be for you if you are, but cleaning small batches that will fit in the beaker work excellent, 20 7mm-08 fit with room to spare. I deprime with a Lee universal decapper, then place the cases inside a Kimax beaker as described in the 6mmBr article. Add just enough Birchwood/Casey case cleaner mix to cover the cases, then run them in the machine for 3 minutes, rinse good, then run them in water for 8 minutes. While it's running, preheat your over to 200º, rinse again and make sure all the water is dumped out of each case, lay them on a paper towel on a cookie sheet and place in the oven, turn the heat off, they'll be dry in less the 30 minutes. These are once fired Federal 7mm-08, the results speak for themselves. The cases in the 6mmBr article are 4x fired, so they took a lot longer to clean.
Tim
http://www.6mmbr.com/ultrasonic.html