The research is there which shows it can be effective, however, is lacking in defining for whom it is effective (what age groups, diagnosis, other factors) and at what level of consistency, or for the length of time the improvement lasts. Some research suggests the improvement is mostly a placebo effect, but to me that shouldn't matter because improvement is improvement even if nothing has actually changed. And often times people only need to see some improvement to get the motivation to continue on the path to healing that seemed impossible before.

Additionally, some practitioners who use it charge ridiculous rates for it because they know people get to a point they are desperate and they take advantage of that and bill crazy rates for it, so be careful to find someone you trust to not do that. In summary, it can be effective, but is not a guarantee and the research on it, comparatively, is in the early stages. If you have tried other things that just did not work though, it is worth a shot.