Hi...
Irreversible from Daniel Madison it's an excellent trick, has a great impact in people.
But, today I have my first problem with this trick.
I gave the deck to the spectator, and He was able to find the card in the deck (the hidden card). I think that the people who buy the product can understand me.
My deck was ok, and i follow all the steps.
The reason is: "My spectator has sweaty hands"....If your spectator has sweaty hands the irreversible deck doesn't work at all. He always can't find the hidden card in the deck and destroy the effect.
Because of that, beware of spectator with Sweaty Hands.

I hope this will be useful for the comunity.
Chan.