I've owned a vitamix for years -- it's my go to appliance. I bought the personal cup adapter not knowing if I would really use it. Now I use it everyday to make beverages of many kind -- coconut milk, almond milk, golden milk, froth for coffee, etc.. I love the easy clean up -- right in the dishwasher. I will say it does leak once in a blue moon usually because of the rubber ring, so I take the extra few seconds to make sure it's in place before I use it. I bought this for all 4 of our adult children and they love it as well.