I received this item as a gift. I drink a lot of coffee, and I do tend to leave my cups lying around long enough for it to get cold and I have to traipse to the microwave to heat it up for 10 seconds. Even after knowing my habits though, I didn't think I would use this product enough. It seemed like a hassle to have to charge a coffee cup, and because of that I didn't use it for some weeks. After some coaxing, I finally pulled it out of the box and it has changed my life! I kind of feel bad, because this is the only coffee cup I now use. I have whole cabinets filled with awesome mugs and that's where they'll stay.The ceramic mug is ridiculously easy to clean. It isn't dishwasher safe, so it needs to be hand washed. Honestly, all I do is rinse it with hot water and place it back on the charger. It's coffee, and, unlike some cups that keep coffee stains and smells (even after heavy washing), this thing resilient. Just make sure you dry it before putting it back on the charger. Water and electricity usually don't mix well.The one thing I will say is that it keeps my coffee hot, and the less liquid is in the cup, it seems like the hotter it gets. So, after I drink most of my coffee, I tend to turn the cup off so I don't burn my mouth. Since I only use this cup, I don't have mugs piling up with leftover coffee in them either. I only say it changed my life, because one morning I realized I had forgotten to put the cup back on it's charger the day before. I was so bummed having to make my coffee in my batman mug (which is my favorite), that it dawned on me how much I preferred using the Ember mug.Long story short, great mug! Purchased as a gift for my father-in-law too. His experience is much the same as mine, haha. Didn't think we'd care for it, but now we love it!