I have used this chair several times in a local back care store. I've ordered it and it hasn't even come in yet, but I'm in love! For me, the turning point was the separate shoulder sensor, which detects where my neck and shoulder meet. Having detected where my shoulders lie, the chair proceeded to perform a shoulder and upper back massage that was truly better than any human masseuse. It even knew where my shoulder blades were and wrapped the massage down and out around those bones. It was heavenly. Handy tip: there are numerous programs and options within programs, and the remote control doesn't have great descriptions of the amazing functionality of the chair. Print out and laminate the charts in the user manual that display what can be adjusted in each massage, from both the auto massage and the manual massage menus. Now if only my chair would arrive today...