To be honest, my real concern with Sub Rosa is also on the price - that it's too low. Something like this, where it's a REAL secret, unknown to all but (seriously) a select few in the world - able to fool anyone no matter how closely they're looking?
Sub Rosa provides the ability to have the spectator examine and shuffle the deck, as many times as they'd like, however they'd like, and then immediately proceed to control the cards. Better yet - this isn't some crazy, rigged up deck that you can only use for this one routine. You can integrate this technique into whatever deck you use already - right now, and be using this concept tomorrow.
That sort of information is worth its weight in gold, and something I think fairly priced even at $100 for those serious about card magic. That's the sort of information you usually CAN'T buy at all - only learned with private study and direct mentorship. I spent $34.95 yesterday at Outback Steakhouse and I'll never see those dollars again. With Sub Rosa, this is something you'll learn and get value from every day for the rest of your card magic life.