OK lets get right to it...this is NOT a commercial grade grinder. It WILL leave a bean once in a while in your hopper, show some MINOR discrepancies in the grind consistency, But danging people it was less than $50! and in the nearly month of constant use (*over 4lbs of coffee so far!) I have ZERO complaints. I am the most evil product tester on this planet. I built one-off extreme high end engineering computing systems with no tolerance for substandard products...in short I am anal about quality. So far this thing makes the grade for what I expected, ask of it, and needed. If you need absolute perfection in your grind consistency, and want to use it more than I do then pony up the cash and buy a commercial grade unit for 20-100 times as much. The only reason I don't give this 5 stars is I get an unground bean once in about every 16-24oz of coffee (*ya 1 in 2-3 bean hopper loads!).,,,Buy It, Use It or do what I do, while the wife drinks the mud this makes...have a cup of whole leaf tea and leave the beans for the less fortunate.