for the price and what you learn, its a nice effect you can incorporate in your repertoire. i
havent found an opportune time to use it yet but i think if you're ever in a situation where you
need to do an impromptu levitation with business cards, ID/credit cards, or a deck of cards, this
will work great.
as someone mentioned in another review, if you do levitation, you can pack
your favorite gimmicked levitation but have this as a backup when you didnt bring anything.
i personally didnt like the context in which Nathan used this effect but the sleight he taught
was a pretty nice extra and can be used in other tricks.