Okay so on first unboxing glance its a really beautiful mug. The sleek matte black is very stylish. I love that it has a lid too. The charging tray is perfect size doesn't take too much room and sits easily on the charger.  The biggest thing for me was finding out that it will keep your mug hot while not on the charger for a few hours. That is awesome if your on the go or don't want to be stuck with your mug on a charger. That was such a huge plus for me. Can watch tv or clean house or take on the go and not have move charger around to find a plug to keep it warm. I found one downside. The lid sometimes doesn't stay on. I'm not sure why but it will just pop off and not stay down. Other than that this is a really great mug. My perfect temp was the lowest temp. I don't like my coffee scalding but some do and that is also a great benefit of this cup the different temps. Love my Ion Mug!