Five years ago I purchased a KitchenAid 600 pro mixer. Through heavy use I had managed to do serious damage to the gears. I took my beloved mixer to an authorized repair shop for an evaluation as to whether it was worth repairing or needed to be replaced. The repair tech called the company and got them to replace the mixer for free. My new mixer arrived yesterday and I'm now back in mixer heaven. My thanks to KitchenAid for their kindness.I thank them with all my heart.