My wife and I bought the 575 model, after much consideration, as a joint Christmas gift to each other. We now make up our own smoothie recipes every day and have been really enjoying the results. The blender is so powerful that all of the ingredients are blended smoothly together. The recipes we're using are a great way of guaranteeing one's daily intake of vegetables and fruits. And the washing up cycle is an added bonus. We are delighted with our purchase.