This will be my 3rd burr grinder in as many years and the issue is always that the burrs become dull in the 1st 12 mos.  Although Cuisinart is gracious enough to replace the unit, the fact that the burrs are going dull speaks to the workmanship of the unit. I would recommend another brand if you are looking for a long term burr grinder and one with replaceable burrs such as the Baratza Encore.