I have tried several coffee warmers with disappointing results. My first experience with this unit I was using a large metal (camping style) coffee cup and once again the results were disappointing. It just did not keep the coffee hot. Then I switched to an old ceramic style cup (see the photo) and now this unit works perfectly! I just need to be sure I take the cup off when all or most of the coffee is gone. I do wish it had a cutoff timer on it but I am still very happy with it now!This beverage warmer comes in a nice box which makes it perfect for gift giving. It is gravity driven, therefore it’s off when your cup is absent and warming when the cup is present. The heat is sufficient to keep my beverage at the perfect temperature even when I get distracted. This is by far my favorite and will be purchasing more soon. One for the office, one to replace a different warmer that was a disappointment, and still more for gift giving occasions.I absolutely love this warmer! My husband bought it for me a few months after I had my daughter. He felt bad that I always joked about living on “cold coffee” between naps, so he bought me this warmer. It’s perfect for all sizes of coffee cups! It’s been almost two years and it is still working great! It’s now commonly used as a candle warmer (we don’t like to have any flames around with our busy toddler). However, I still use it 1-2x/wk as a coffee cup warmer.The base is nice and wide and accommodates all different size cups. It definitely keeps my large wide cups of coffee at a hot but not scalding temperature. I've even kept bowls of soup warm on it. The only thing that keeps me from giving it five stars, is that if I finish my coffee, I want to put the cup back on the warmer because of limited space on my desk, but you can't turn the warmer off. Otherwise it's been a fantastic purchase and I would highly recommend. I've used it everyday for 3 months with no issues.Looks good and works great.Easy to useI don't drink a lot of hot beverages during the warmer months so I am using this mostly as a candle warmer. I'm not sure if I've done something wrong but each time I put a candle on top it creates a vacuum hole in the middle of the wax once it's cooled down. I thought this would happen just once and maybe I had a faulty candle but it's happened to 3 brand new ones. I have one candle that survived and it is from the same company as the others...weird?!? I took a star off for the mishaps and my only other issue was a delay in receiving the first one I ordered - and by delay I mean it never came. Amazon was quick to replace it, which I appreciated, and I feel like this was a delivery issue not a seller problem.I really enjoy this coffee mug warmer. Before getting it, I found myself making multiple trips to the microwave to reheat my coffee or tea. (I'm terrible about pouring myself a cup and then forgetting about it!) This mug warmer keeps my beverage the perfect temperature.I've also used it a few times with candles when I want the aromatherapy without an open flame. It worked well for that purpose also.The only feature I wish it had was an on/off switch. It turns on automatically when a cup is placed on it, which is convenient and I thought I would really like that, but because I keep it on my work desk, I'm always afraid I'll set something down on it that turns it on unintentionally. I find myself unplugging it after every use to make sure I don't accidentally turn it on.冬にホットのお茶(ペットボトル)を飲む際に、直ぐにぬるくなるので保温に…と思って購入しました。まぁ、ペットボトルの加熱は推奨されてませんが、溶けてしまうほどの高温ではないので問題は無かったですが…飲んでお茶の量が減ると軽くなる分、加熱スイッチが反応しなくなるので、やはりマグカップ等、最低限の重さがないとダメなのかもです。ちなみに冷える前に触ると結構熱かったので火傷に注意ですw