I love my Vitamix classic.  I bought the personal adapter for smoothies.  It is a real pain to use and needs to be redesigned. The base is too big and it is difficult to screw the personal cup into it.  It takes severa attempts to get it seeded correctly.  The second issue is that if it freezes up as not enough liquid, you have to unscrew the entire set up to hand mix and add more liquid.  I really am surprised that Vitamix designed such a poor product.