I've been to 2 trainings with Mckenna-Breen.

They have the latest technologies in NLP as they train with Richard Bandler.

I never listened to this audio program, but the ones I have of them are good and full of useful distinctions on the topic.

If you want the skills, I'd say go to a live training, it's much better to really acquire skills.

Richard Bandler is giving some in the U.S www.purenlp.com or I can give you other names of trainers I experienced and got mesurable skills.

My opinion!

Alex