I had acquired the grinder before purchasing my second espresso machine with an integrated grinding mill. Whoever acquires it will not be disappointed at all, as it grinds consistently, not particularly fast like all manual grinding mills (it also depends on the user's hand), with excellent results and no gaps, especially in fine grinding, especially if you grind recently roasted coffee (you should prefer not too fine grinding). Personally, I will keep it for emergencies. Its price is reasonable, not for its effectiveness, as there are many more expensive manual grinding mills. Its maintenance is relatively simple, and there are instructions in its box
