First things first, this is kind of a situational effect. Not that you can't perform it impromptu or only with long sleeves or something, but you CANNOT perform it as a casual or easy-going trick.
I find it quite difficult to be in the situation to perform it. It will take lots of maturity, as praetoritevong says, and your audience also has to be mature enough to believe you, makig it a REAL moment for them, instead of just another TRICK to heckle with. It takes audience management, psychology, and also good timing to perfect it.
Think about it for a week or so before buying, but I'm not going to tell you whether it's worth the mone or not. It is entirely up to what you get out of Control.
Daniel Garcia's effect (bonus) is very nice, and a wonderful effect to follow--or accompany--Control. Danny is also hilarious (as always). His definition of "Cerca Trova" is...undescibable.
::dAvid