This trick is great. I personally haven't got it yet, but I understand it and Mark Benthimer did it to me at Magicfest at the Jantzen Beach mall in Oregon, 1 foot away from me.
i'm used to things like twisted aces or mercury, so the effect wasnt as great, but now that i watch it over and over again.. it's much more different. Then the color change it has wow... then another Change WOWOW..makes the trick have a double and even triple kicker for those that don't understand magic.
I recommend this for everyone.