Ehh

So, this is a fairly new methodology to me, but when performed, the spectator was not impressed. At all. The same thing happened to me as in the trailer; where the spec seemed unsure of what they had seen appear on the paper. Always, I will probably not perform this again, with the only occasion being in a situation where I am unprepared for a few tricks. Oh, and its not impromptu.
Honestly? Save your money. I do, however, look forward to seeing what other applications fellow magicians use this idea towards.