This is the 100th Monkey effect for close up. Then at the end they have proof that the magic
occurred. Proof that they were hypnotized or proof that their ability to read was taken away or
proof that magic just happened - they will have a photograph or video to keep (and hopefully post it
somewhere and tag you in it!)
If there is one con it could be that it is a little difficult
to do it in bright situations. However Chris does tell you how you can do it (as he did use the
gimmicks on a bright sunny Souther California day).
Also there are a ton of added gimmicks
(that you have to print yourself).
It's great TV quality magic, it's easy to do, it can fit
in your pocket (you can print out your own gimmick and keep it folded in your wallet and just print
more when that gimmick wears out) and it leaves them with an amazing souvenir which could possibly
turn into free advertising for you. What more could you want?