I have used one and a heated towel feels wonderful after a shower on a cold winter morning. Most towel warmers have built-in electric heating elements. Some are simple plug-in designs while others are hardwired. If you have hot water heat, select a design that circulates hot water through the towel warmer itself. Electric towel warmers use low-wattage heating elements and can save money overall.
People often set up the furnace thermostat in the morning because they feel chilly.
A toasty warm towel eliminates this uncomfortable chill. For the most convenience and efficient operation, select a model with a programmable timer. It takes several minutes for a towel warmer to heat up. The timer will start it early so your warm towel is waiting when you step out of the shower. The timer also turns it off if you forget.