I purchased this direct from Enigma before I knew that Penguin was offering it. The concept is
original and the teaching is pretty good. It's not incredibly difficult to perform but it will take
a lot of practice to master. This is not one of those effects that you can perform before you've
got it down 100%. It's also a bit of a knack to get the timing and execution working together.
Some people may find they just don't seem to get it.