I bought Twisted Sisters like 5 years ago when I first got into magic, and it instantly became one of my favorite tricks. However, I didn't really perform it much because it was gaffed and I don't like carrying around stuff with me especially if it can't be examined. So Twisted Sisters went into the magic junk drawer.
(fast forward 4 years)
John Bannon has done what magicians were waiting years for - create a version of Twisted Sisters that is examinable.

Enter Duplicity...

Effect: Same exact as Twisted Sis. but with aces.

Slights: Only one slight is used, and it's a slight that every magician knows (and if they don't - John teaches it in depth).

Difficulty: The hardest part is remembering the patter. You are gonna have to remember some patter, but it's quite simple to remember.

Practicality: EXTREMELY practical. You can so this trick for close-up, walkaround, and stage (if you have a projector bec. the cards are small - but you can always use jumbo cards).

Set UP/Reset : 3 seconds each.

Reactions: Worth a LOT more than $11.25

DVD: Very well made. And you get an AWESOME bonus effect which kills people!

Conclusion: If you don't have Duplicity, buy it. NOW. You won't regret it.