I was in this group in the mid 1970s. Supposedly it was a Fourth Way school (Gurdjieff-Ouspensky) but Burton had no real connection with authentic Fourth Way teachers. Current members are required to give a large portion of their income to the group. If they leave, they are doomed forever (sound familiar?). There have been numerous charges by former male students that they are lured into sex with Burton, who promises them that sex with him will aid their enlightenment. Check out the history page of this site for more details: http://fellowshipoffriends.wikispaces.com/
Mark