I received this mug warmer as a gift, to use at my office and it is fantastic. It can take me a few hours to finish a mug of tea while at work and this warmer does an amazing job keeping the tea warm. People complaining that the warmer doesn't keep their drink hot probably prefer their coffee/tea piping hot. But nothing, other than reheating the drink will achieve this. If you use the warmer for it's intended purpose - to keep the drink warm - you will be pleased.