This truly is an amazingly clean and visual way to do magic, especially if you make some gimmicks
with your business cards.
I will admit though if you are not good at "arts and crafts" or
creating gimmicks with your steady hands this may not be for you. The particular "something" that
you use to make your gimmicks WILL be difficult the first time you use it... but like all things
with practice you'll get better and it won't be as difficult.
This really is a great
effect if your creative and can think outside the box with it!