Found this paper, all of which is well worth reading.
Over the years, many former members of Siddha and SYDA yoga have written with deep emotion how they came to recognize how abusive the organization was, that they knew in looking back that they had made the right decision to leave.
But despite this conscious recognition, many spoke of the bliss they had felt not once, but many times,
Forum:
"Cults," Sects, and "New Religious Movements"