KitchenAid sent me a K400 blender to replace my faulty 5-Speed Diamond blender that was under warranty. This is the BEST blender I have ever used! I make smoothies every morning and with the Diamond, I would have to stop several times to stir and balance ingredients. With the K400, I add all of the ingredients, set the smoothie setting, and it comes out perfectly blended every time. I'm super impressed! An added bonus is that it looks nice on the counter.