I absolutely loved it how it keeps my coffee at a set temperature I want. I mostly enjoy drinking herbal tea and that requires a perfect temperature or else that would be bitter in taste. Now with this new SMART ION MUG I am least worried about temperature and not scared of sipping first and realizing the drink is too hot. I know each time it is same hot/warm what I want and I can enjoy my hot drink for a longer period of time without worrying to reheat as MUG keeps the temperature constant on its base. It is certainly a smart choice to own this….. !!!