I've been working this since the beginning of the year - I highly recommend it for a number of reasons:
a) You're getting away from doing a magic trick with a pack of cards, you can afford to be more casual and adlib by utilizing just one card as if it's an afterthought to your presentation.
You are free of the 52 card look.
b) It is super simple, and unlike other effects by RL that require you to be tearing and positioning pieces with a bit more thought and attention - this effect is fool proof as it's so simple to do in any situation
c) Sure, you can get a girls number with this...but getting your client's details are far more valuable if you want to keep earning the $$$ !
It's great effect to do to exchange personal info without really having to ask to do so as it's part of the effect. Genius.
d) I'm not a fan of effects that always market "REQUIRES NO SLEIGHT OF HAND", but I like this because you can ditch your cards and focus on your presentation...it is just a single card.
Great as an opener, or as an afterthought if you'd like to pass on your details and grab theirs! Well done RL !