I have had Vitamix machines for many years now and this is such a great addition. I like that I don't feel I have to fill the big container with smoothie items. I make two and have one in the evenings and  put the other in the fridge and it is ready to grab and go in the am. Just need to stir the ingredients. Highly recommend the cup adapter and now know what I will be buying for Christmas for some of my family members.