I received the Mug Warmer as a holiday gift in winter 2019. I've been using it frequently and happily since. Until it stopped working a few days ago. One day it was fine, the next morning when I went to use it again, it had stopped heating entirely. The device turns on; the red light appears; but no heat emanates from the surface. I am disappointed that I'll have to replace a fairly new item, especially since I had enjoyed it so much to start. Thus the 2 stars instead of 1; it worked well to start!