Like a few guys on here I've been lucky enough to have a look at this first hand, and I have to say... it's a worker!
If you haven't seen it, you can watch Lee perform it here
http://www.youtube.com/watch?v=5z0yb6zDD5k
The effect is practically self working, leaving you to concetrate on the performance and getting the laughs.. which I guarantee you will!!
Simple premise, no sleight of hand, audience participation and a lasting souvenir with your contact details on... what more could you want from a pocket trick?
Lee is considering bringing this out as a stand alone effect... whatever he does I would say BUY IT