I have received a permanent stimulator but this is in my cervical neck area. I have had problems from the very beginning even on the trials. They say that the neck area is the hardest for one of these to be put in. I am having another leed put into my neck area this week. I hope this gives me some relief because the pain is getting real bad. I can say it did work for me when I fist got it put in but then I got the flu and it has never worked for me since. For some reason it was giving me a headache every time I turned it on and that was not good. They have decided to put a third leed in to offset the others. I have decided if this does not work the only other option is a pain pump but the doctors don't want to do that because I am still so young. All I can do is keep trying what the doctors want me to. I hope it helps.