I felt dubious about paying so much for the heating mat – I tried many heating pads previously and none of them worked. I have arthritis in my spine and fibromyalgia. But when I started using the mat I knew that was a good decision. The heat feels very different compared to other heating devices I have used, and the size is big enough to lay comfortably to cover the whole body – it’s 71″ long. I recommend InfraMat to anyone suffering a back pain or arthritis.