Again I don't mean to be a party-pooper, but there had been discoveries of flaws, cheating, and lack of vigor in researches conducted/supported by TM. Photos of levitation are among them. This doesn't erase their accomplishment in bringing forth to the world this important and lacking realm, but still casts serious doubt on the credibility of other researches as well.
Rigorous and well-recognised research are limited mostly to meditation. For most outsiders it's difficult to tell how credible a research result is, because such researches are usually funded by related (and thus biased) institutions who would try to protect their own interests. Yet, as a HongKonger where research in chinese medicine are rather hot lately, I could say they're mostly credible, and Chinese medicine are found to be effective (other than being a placebo) within limits--- I think about half is useful, another half is superstitious tradition. At the moment it's difficult to separate the two, and they might just be interlinked forever. I myself now take a practical view on Chinese Medicine, looking only at the result with the "theory" being a convenient model in a functional way by passing everything "under the hood".