I love effects like this where you can concentrate completely on presentation and not worry about some knuckle-busting move. The handling here is so natural throughout the effect that you'll never even have to think about it after you've practiced a few minutes. The construction of the gimmick takes almost no time, is fairly sturdy, and is pretty much undetectable. The fact that you hand out both the card and dollar afterward for inspection only sells the effect that much more. Top it all off with the fact that the effect practically resets itself naturally, and you've got a winner.