I purchased this as a replacement for my last heating pad (same one) which finally bit the dust after 9 years. I would say that I used it frequently, during some periods multiple times a day, so it's lasted a long time. I tried other, cheaper options before purchasing this pad, it truly is the best for moist heat in my opinion. The only reason for 4stars is that it beeps to turn off and when you are altering settings, the sound is a lot louder than needed.