I recently started a WFH job and almost immediately started having pain in my right shoulder and back. I'm short (5 ft) and I was finding it very difficult to sit all day. I purchased two different office chairs and several foam pads - not to mention a raised desk-trying to find something that was comfortable- nothing helped. I am so glad I found Ergo Impact chair! Within two weeks, my shoulder and back pain are gone. I do need an additional footrest just because I'm so short, but I find that I really don't spend that much time sitting. Definitely worth the money!
We (me and my wife) absolute love this, and my wife basically stole this from my LeanRite. It's an ultimage calf/foot massager you can use on your bed.. haha. It work very well on LeanRite too, and it makes you lean back more (which is good for your posture).
I feel very spoiled. This works great with the chair and without the chair, with heat and without heat. Not just for your back. The instructions show you that it can be used for any part of your body (neck, shoulders, hamstrings, calves, etc...).