It doesn't work. You do.
How long will it take you to learn? How long before you start?
With a once through the course doing the assignments as you go you will be able to get your reading done in 1/3 the time it takes you now.
The course comes with a money back guarantee and if you actually do it you will have lernt the system under a month.(If you're a slow learner or shipment is slow to your country, you can contact LSC for an extention.)
In all if you do the tape course as instructed you could complete it in one weekend (approx 12 hours) and during that time have gone through 3 books.
Alex