Bests & Worsts Reviews from Amazon

I took into consideration 2 specific reviews. 1.) The person who intentionally left their warmer on overnight, unattended with the end result of the warmer melting and burning into their counter (duh!) and 2.) Another who suggested using a silicone beverage cover to retain heat. That being said, as a precaution I placed a stone coaster with a cork bottom under my warmer and also purchased a silicone beverage cover from BBB (they also sell them on Amazon) as to deter loss of heat through evaporation. I the conducted an experiment where I filled my coffee mug with room temp coffee and creamer from the fridge and placed my mug with cover on burner. Within 45 minutes my coffee was comfortably warm, not scolding but perfectly toasty to cuddle up with and drink with easy. Beats microwaving. I recommend for those who always get to their drinks after they have cooled. And for the price, I bought 2. One for the living room and one for my nightstand.