It's a bit disappointing. The grinding thickness cannot be adjusted. It was described as something that can be adjusted with a screw at the bottom, but there's not much difference. If you don't lock that screw properly, it can come off easily, so it doesn't seem very useful. There are other products with a similar price that allow you to select the thickness from the outside of the body, which might be better... I'm debating whether to buy a manual one even if it's a bit of a hassle.