I’ve used it a couple times milling whole wheat berries and rice for the first run through, per the instructions. It milled the grains to flour quickly.
I had another decent mill, but it sounded like a 747 was landing in the kitchen, and it took a bit to mill flour. This one is a lot quieter (sounds like a vacuum cleaner) and is quick. My favorite is that the container that holds the flour is right in the machine not outside with a hose. I also like that I can keep the top off and see the grains while it mills. I’m happy with my purchase.