I've had a vitamix for a few years and use it for all kinds of smoothies, soup, ice cream, making flour. Its amazing.  The only problem was making smoothies in the morning was that its a bit of a pain - cleaning the blender, making more than my cup could hold etc. So the personal cup seemed perfect- I could make it and go. BUT, the personal cup isn't really the same thing as the regular blender. It just can't blend as well so I have to put in less ice and frozen fruit so its not as cold and thick as I like it. It also can't hold as much so my smoothies are quite a bit smaller. But, I've adjusted my recipes and gotten used to a smaller smoothie because the convenience of one cup is worth it. I just do more of a blended juice than a frozen smoothie these days.  So, its good, not great.  If it was a different shape and was able to flow the frozen stuff down better so it could blend better, and if it was slightly larger, it would be perfect.