I've had my 4-therapy Healthy Wave mat for almost a year now and am so glad I decided to purchase it. I used it twice daily for the first few weeks, then once a day for months and now about 4 or 5 times a week. It's too firm for me to sleep on, as I have had fibromyalgia for many years, but the regular PEMF therapy and Far-Infrared heat have been so comforting and healing for my joint and muscle pain, as well as helping me recover from chronic tendonitis in both my knee and shoulder. I honestly cannot imagine ever being without this mat now that I've benefited so much from it.