I like the trick and it's a good idea, but the gimmick is very poor :-(
It is the colour of the
front of the cards that are very grey or beige. It is so bad that you can not fool anyone to believe
that it is the same card, that they were holding before. So it is worthless and you can't use it and
it doesn't deserve the one star.
Even on the demonstration I noticed the difference when
Sankey puts a normal card in between the false ones.
You get two sets and the other one is
even worse. I don't understand how he can make such bad gimmicks. They are unusable and you see it
right away. The back of the cards are perfect and that should be the hardest to duplicate. But
duplicating a single white colour apparently is very very difficult...
These gimmicks aren't on Bicycle stock, that's true. But to say they're unusable is willful ignorance at best. If you really think a layperson is going to notice the difference, either you don't understand audience management, or you're just an angry person who complains about everything. Either way, your reasoning for a poor review is absolutely ridiculous.