I thought I read that some vets who received TMS treatment for PTSD still had some pretty severe mood disturbances/personality changes. I don't know if it was clearly established whether those symptoms were entirely consistent with PTSD, or whether the particular doctor responsible for many of the cases was 'doing it wrong' and needs to have his license revoked.

I suppose like most medical treatments, if the cure has a small enough probability of being worse than the disease, we will use it anyway and work on ways to deal with the side effects when they arise.