I bought this coffee grinder one month ago to replace my cheap Black & Decker unit. This Kitchen Aid appliance is the worst coffee grinder I have ever owned (5 in my lifetime). Reasons: 1. Motor is way too loud while grinding  2. Grounds fall out of machine while grinding because seal of top and machine body is imperfect. 3. Beans not completely ground no matter how long I grind.  4. Removable grinding chamber (a nice feature) has dangerously sharp top edge. 5. Metal grinding chamber absorbs the finest grounds and retains coffee color.