Hi thanks for your reply. The trial relief was about maybe 5, I could walk about two more blocks but I still had cramping and throbbing. My main symptoms are in my calf muscles when I walk. So I could walk a little longer I have to say but I still had the cramping. I found the doctor to be out of touch with what it must be like to have chronic pain which I suppose of course he can't know unless he has it. But the day I went in to get the trial stimulator taken out I had hardly slept as usual and I told him that and he seemed surprised and he said why couldn't you sleep? And I told him the battery was so uncomfortable I could not sleep plus I also had cramps. I wish these doctors would try these products out on themselves or at least try sleeping with a huge battery on your back.