I had the Revimmune protocol 38 months ago. I don't have MS, but myasthenia gravis. It has been totally worth it, although I wish I'd done it earlier. I was 48 when I did the treatment, and the first, and so far only patient to do it for MG at the center which did mine.
While I can't say I am symptom free or medication free, I can say that overall I am 90% better than I was prior to doing the treatment. My goal was to be able to spend my daughter's high school years in relative health, and that has so far happened. She will graduate in 2015. High school is tough enough for a kid without worrying about a very ill mom.
The treatment came with a few costs to me. It sent me into an immediate menopause, which was no piece of cake. I had complications (neutropenic fever) and my white blood counts, lymphs, etc have yet to really return to normal, although I'm also on an immune suppressor (but was prior to the treatment with no such effects.) I have found that I definitely lost some cognitive strength, especially in the first couple of years. I wasn't "sharp" anymore, and my reflexes were slower. That has improved over time, however. I also never take my "good days" for granted. My worst days now are about like my best days then. I'd do it again in a heartbeat.
I definitely think this is something to consider for "buying time." It's important, however, to look at it as a treatment, not a cure. I went into it with the mindset that even a 50% improvement would mean the world. I guess you could say I won the lottery.
Take care everyone!