Whoever was in charge of testing this in the lab apparently had the day off. Look....it grinds fine, but the original design is a complete mess.....coffee grinds are everywhere! Took the advice from another user who basically discarded the entire top piece, put the plastic lid on the cup and used a small (in my case the end of a chopstick) something to push the motor button down. Now we have a nice grinder. Serves the purpose but does not look good sitting on the counter. Have many Cuisinart small appliances but this one was not their shining moment!!