After using it for a long time the old model (white) with my parents, I bought it for me. I'm disapointed. When I mouline powders (almonds, biscuits ...), the powder escapes through the remaining free space in the center of the disc. I find myself with powder 1 / disk under the cover 2 / on the perimeter of the mill where the cover joins the base of the unit). So a lot of cleaning (inside mill but also obviously outside and work plan). So I hesitate before using. If I could, I would trade it without hesitation against the old model, which is still selling. Otherwise, nothing to say on efficiency, although it mouline.