Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Better than advertised

These are the greatest heating pads for sore muscles that I've ever used, and they actually work better than advertised--the box says they work for eight hours but I find they provide comforting warmth for 12--14 hours. Because they have self adhesive strips you're not tied down to a heating pad and can carry on with your daily activities. Use these for your neck and shoulders as well as any muscles that hurt from too much excercise. I cut them in half, avoiding the charcoal "dots," and use regular tape to secure them to my legs, arms, shoulder--where ever I need them. They provide better relief than any creams or salves. When I wear any of the ThermaCare products to bed, I wake up pain free. They're terrific!