This is a beautiful change and does not seem to be terribly difficult. There are two negatives for
me. You can not borrow a bill and instantly change it and you cannot change it back. To be fair,
the description does not say that you can, I just assumed I would be able to do that. If you want
to show your own bill and change it to another and that is all then it is a beautiful effect but for
me it loses something without the bill being borrowed. Who knows, with people rarely carrying cash
anymore this very well may get in my repertoire.