The Nightingale Conant production has the exact scripts used in the Silva Method seminars (each lecturer is supposed to read the induction techniques from a manual and use the exact wordings given - so anywhere that you go, the programming should be exactly the same). To gain any real benefit from the Nightingale Conant production, I would recommend going through the training to get to "level" a number of times (perhaps repeating the course several times over a couple of months). I think that you can achieve some spectacular results with the home study course.