Sleek, easy to clean, and unlike other reviewers I think the size is absolutely perfect, awesome idea thank you Ember! I've had mine a couple of months, actually ordered an extra charger for my office desk and a second Ember mug just to make sure I always have a backup when traveling. Just cannot tell you how nifty it is to be able to sit at my computer, read a book or watch a good movie and not have to reheat my coffee in the microwave. Works great for tea and hot chocolate as well. This mug is one of the best gifts I have ever received. A friend of mine who knows that I like my coffee really hot gave it to me for my birthday. I only have one suggestion and I'm sure it's not doable but if there is any way Ember to give us any hotter temp settings that would be the bomb! Ideally I drink coffee at 175, I know I know but I do... maybe even 10 more degrees??? Just sayin!