I've only been using the mug for a couple of days now, but it is exactly what I hoped it would be! It keeps my tea or coffee at the perfect temperature for as long as I need it to, which is great because I take a couple of hours to drink a mug on average. It looks great too! I love the color and it's fun that you can customize the little colored light on the mug. The app is nice too. My only complaint is that the battery life off of the charger is only about an hour, so it's best for when you're sitting at your desk.