Things get tricky when you are asking a person to disregard the advice of his therapist, but in this case I would say TM is most likely a "no-no." Now I don't know precisely what your friend is being advised to do, but if it is connected with the organization of the guru Maharishi then I would definitely warn her against it. The Maharishi group is basically a money-sucking cult of the worst sort. Did the therapist suggest TM as a generic practice, or did he refer your friend to a specific teacher/ organization? I actually sat through a long lecture advocating TM (my excuse was that David Lynch was the main speaker) and I got the same impression you did. I also have a friend who tried it out- essentially you are given a mantra by the teacher which he deems to be most appropriate for your mental state, and you meditate on this mantra. Usually the mantra costs a large sum of money, though my friend was allowed to try out TM for free. Is your friend an Orthodox Christian? I think a good question for the therapist would be, 'what can TM accomplish that concentration on the Jesus Prayer can't?' Unless the therapist is a TM devotee, he might be inclined to accept the Jesus Prayer as an alternative. Oftentimes these therapists are just interested in certain results (e.g., decreased anxiety) and not in deeper spiritual questions.