I've had quite a few travel mug. So far, this is the best that I've ever had. FIrst of all, it keeps the coffee hot for quite a while. I would say, it stays warm enough to be pleasant around 5 hours. Also, how hot it stays depends on how often you open it. The second reason I love this mug is it is super simple to clean. There is nowhere for the coffee to get trapped and fester. It's also really simple to put together. Lastly, it's really easy to tell if it's open or not. I love this thing.