Prefacing this with the following: haven’t gotten around to trying this out in the wild yet.
The explanation is solid and booklet is clearly written. The effect is as shown in the trailer.
So far there’s one downside and one potential downside I’ve found: without spoiling any fun, this is
not a “vanilla” deck and chances are you’ll need to get some more materials to construct it (meaning
you can’t just grab any random deck and get into it). As for the potential downside: if you’re
someone who puts a lot of value in the spectator carefully examining the deck or shuffling it, this
might not be the effect for you (or take it as a good chance to learn a deckswitch, don’t let me
limit what you can and can’t do).