First of all the idea is great and most magicians might know what it is all about. Great reactions
too and if you know how to handle the audience you can end let's say kind of clean. I don't think
the audience would "feel" if there is a difference between the cards.
The reason i ordered
it is, because for the price i expected at least a few more gimmicks, not just one. For that price
you could create it yourself multiple times.