We are very happy with this tumbler. It's been running non stop for a few months now. We also have the next model, a bit more expensive with more features which is also great, but for us this cheaper one is all we need. More quiet than our lortone tumbler and larger capacity. Solid, quality build, brushes motor should run for ever.
The only criticisms are that we have to run it on minimum speed as the rest are too fast for our beach agates. Also, not sure why, but it surges if there's not enough rocks, speeds up and slows down and can eventually stop with an error. But when it's full enough, I guess it's better balanced.