Hi Murof,
I have the "Power to Influence" tapeset. It's nice, but it is not exactly what I would recommend. Michael and Paul have learned so much since they made those tapes!!
Instead I would recommend live training (I'm going to attend to the Hypnosis training next spring :-DDD). Paul is something you just have to experience LIVE!
The Richard Bandler cd sets are also excellent.
Purjo