"The DVD offers very clear instructions on both the prep work and the performing aspects. One-time prep work needs to be done to prepare the furnished envelopes for use. The DVD case indicates this prep work should take about eight minutes; it might take a bit longer than that, but not much more. Once this is completed, you never have to redo it. The effect can use virtually any type of bill, so you are not limited to a certain country’s currency. The reset is about three to five seconds." -Tom Craven, Linking Ring Magazine