It's a life saver for those 'pain in the butt' clients that can't retain information that well, I have it and will continue to get it... you can design print offs for your clients w/ description, pictures, sets/reps, etc... plus not to mention a huge exercise/flexibilty library that has progressions, pictures, videos, etc...
Also, they have a research corner where you can ask questions, article corner where there's TON of articles, audio collection of speakers... Free CEC's, Virtual Workshops, etcs...