First the bad, I think that this is a little expensive for what it is and when I started watching
the tutorial, it seemed a bit familiar - I have seen at least three other magicians teach very
similar tricks but the additional feature that this brings is quite inspiring.
I had one
thought about how to get a phone number which isn't too creepy - just seek out your chosen spectator
as early as possible (depending on the circumstances, this could be hours or days) and tell them
that you have lost their phone and could they ring it. As soon as you hear your phone ring, thank
them and don't even look at the screen so that they may not even think about it later.
Also, when I was trying to find good banknotes (for their numbers) and finding it a bit awkward,
I had the idea of using lettered cards such as I remember using with an old game called Lexicon and
that way, a whole fully formed word or name could be revealed. I know that Bicycle produce such
decks but I just found that there are loads of old Lexicon sets on eBay (note to moderator, these
are vintage games not magic items and no longer produced so I don't think that this counts as
referencing products not supplied by Penguin) and apart from being cheaper, they bring a story with
them; e.g. 'maybe you remember this game from your childhood...' etc. (I could almost see Derren
Brown doing it if he still used cards). There are other similar games - one I remember called
Kan-U-Go but the cards were significantly smaller than a regular deck so wouldn't handle very well.
Anyway, as I said at the outset, quite inspiring.