I’ve had several heated mattress pads over the years. This is by far the best ! Your mattress is transformed into a luxury  mattress .It’s much softer to cuddle up in, it keeps you warm and cozy.as I’m older and have arthritis, I can tell you this is wonderful as it it reduces pain and discomfort ,keeping your joints warm and helping you to be able to fall asleep sooner and stay sleeping. As a retired Registered Nurse, I can tell you this is a warm ,comfortable,and pain reducing mattress. The Sherpa is what makes it fantastic. I would tell anyone to buy this Sherpa mattress,they would not be disappointed. The controls are easy to use and you can have one side on and the other off .a win,win situation! I give 10 stars!!