That was my first tumbler.
Mine burned out in about 3 months, but they replaced it free, and the replacement arrived within 10 days of notification, they did not require that I return the defective unit. Great customer service!
However, in the meantime, I had purchased one of these:
Lyman Turbo 2500 Pro Magnum Case Tumbler 110 Volt - MidwayUSA
It tumbles much more vigorously, and will do the job in less than half the time, as well as being larger.
Noise is roughly equal for the two.
For the price difference, the Lyman is a much better deal, at least in my mind.