I had an autologous stem cell transplant a year ago, and I don't know that I can say it did anything. I mean, it's possible, but the doctor who did it said it would be 9 months before I began to see any improvement. 9 months is too long to definitively say anything for sure if you improve, cause it could be for other reasons or just spontaneous. I only did it because my dad had been on my case for months to try it, for some reason convinced it would cure me. I didn't have the same opinion (hence my resistance) but finally threw in the towel to shut him up and prove him wrong so he would trust that I knew what works. The one thing I did gain was travelling to Phoenix, because I suddenly felt much better here, which proved to be true when I moved here a few months later (I don't think it was just being in a warm dry climate either as I was living in Tucson for my first and worst year of this damn disease). That was worth the 7,000 I spent.
Anyhow, There seems to be disagreement about which kinds of stem cells work best, and where to derive them from. The place I went thinks mesenchymal are best and they take them from your upper gluteal area. It was the most painful thing I have ever endured.
I know people with Lyme and other conditions have more luck with it, but at this point no CFS/ME doctor considers it an effective treatment.
Of course you may be lucky and find you feel better in the place you travel to for treatment, but then you don't need to sign up for stem cell therapy to do that