I have not but I know a lot of people have. Success, like any treatment for CRPS, is mixed. Some respond very well and have even gone into remission. Others had bad side effects and/or got no relief. And of course lots of results in the middle somewhere. If you do a search on here you can find some posts about it and about the different protocols and doses and stuff. There are different options out there with inpatient and outpatient options, different doses, different schedules, etc. I've looked into it before but never felt like it was the right option for me (though no doctor ever offered it either). There are some pretty amazing success stories out there though so definitely worth researching to see if it's something he wants to try.