The LEM Big Bite grinders have a 5 year warranty; Academy says 2 year. The grind per minute - 4 lbs - is for a Big Bite 5, not the 8 which is 7 lbs per minute. I think Academy has made an error. A phone call from a prospective buyer might clear it up. It may or may not be a Big Bite (which has a large grab on the auger).