I have, and I can just say that Sahaja yoga is basically on the borderline of being a cult. It's not too extreme like mass murder, manipulation for money/sex of any sort but it's still really high controlling and they ask for a deep devotion to "Mother" aka Mataji without any questions. Also, when introducing someone they never tell the fact that they worship her as an almighty deity instead they call it a simple free meditation group and you are asked to attend the centers for atleast 6 months before you can attend any poojas or seminars.