30-day Money back satisfaction guarantee which you can get extended if you ask.
It also entitles you to coaching if you need it and if you choose you can get email follow ups to help you use the PhotoReading day to day.
Some have no choice other than to learn from the book. It's difficult to convince parents that money spent on the PhotoReading course is a better investment than an X-Box 
Those who can afford it often prefer the live seminar. The Home Study course is good because it suits your time table and is ready when you are. It also suits those who like to learn things without people watching over their shoulder.
Alex