mantak chia?

Does anyone know if his methods of meditation (nei gung) are safe or authentic or even effective? I’ve heard good and bad things about him and wondered if anyone has firsthand experience.

Knowing others is wisdom, Knowing the self is enlightenment- Lao Tzu

just saw this same post lower down

Well, maybe there’s some new people on here that have tried his methods?

Knowing others is wisdom, Knowing the self is enlightenment- Lao Tzu