As with anything in medicine, you need to consider the risks/benefits. I don't think it's worth repeating numerous time however, that all depends on your state of mind and your MS progression. Just like anything else, some people respond to this and others do not. I agree, more studies need to be done but they are certainly being delayed by certain parties that have egos and money to lose in this process.
From personal experience, I can say that nothing, no drug, has ever given me such relief from my symptoms like this treatment has.
I hope more can experience this and get some quality of life back.