I like my 3 roller, it gives the grain an extra step in processing. If you've seen the commercial mills they have lots of rollers. If I were shopping for a mill, I'd get a two roller MM2 2.0. But the MM3 1.5 will most likely out live me. As the other poster said, 3rollers are hard on drills, I burned-up a set of brushes before I motorized it.