Bought 2 of these. First one worked once, then could not get the cup off the grinder. Called customer service and they said they had never hear of this problem. Returned it to the store, tried another one, same thing happened. When I returned it this time, the sales clerk guessed what was wrong before I even told her because they had so many of these returned. They encouraged me not to buy a Cuisinart product. Have a black and decker burr grind now and so far so good.