Review (2/5): Save your money, it's not that great.
This sucks! I tested with a polish that had been sitting for a while. After all, I'm capable of giving a few arm shakes of a polish that's already fairly well mixed. I bought this specifically for polish that needs some extra help. Does not do the job. It's more quiet than some and has little rubber feet so it doesn't slide everywhere (but still moves a little). Wouldn't recommend, wouldn't purchase again. After trying several bottles, I donated it so someone else could try it.