Well Jodiamond I have not tried so many other things from Paul McKenna.. Only got the Success for Life from Paul McKenna which has changed its name to Positivity. I think there is only some small changes between them and also the SelfConfidence and Charisma, I think it is in the Positivity but not in the Success for Life.
Purjo, I have never experienced him in a live seminar, but on his tapes etc there his voice is very well and deep trancing.. a good woice to go into trance with. But it also look like on the Positivity and Success for Life there is some pinches in his voice, and I think he uses a kind for brain entrainment technique, not like binaural beats, but pinches in a rythem.. sometimes faster, sometimes it slows down and you go deeper into trance...
Murof.