I don't know much about it in terms of personal experience. The first therapist I ever saw became a big fan of EMDR and my partner went to her a few times and did it reporting back that it had positive effects on her. I have done sacral cranial therapy and, whether real or not, doing it has helped me with why I went. I have done it more than one time in my life.
Remember the reports about placebo's - they work a lot of the time.
Does it matter why something works as long as it does? I don't think with things like this, that they are particularly harmful and so why not give it a try and see- the worst thing is they don't help and you move on to something that does. Best case is they do help.