This is a heavily-gimmicked deck, but it's gimmicked in ways that are very familiar to anyone who's
ever done any work with cards. Too familiar, perhaps. Hasn't everyone seen those "trick decks"
where they look like one thing if you riffle it this way, but look like something else if you riffle
it the other way? Laymen may not know what to call it, but plenty of them have seen them.
The biggest problem with this deck is that you're showing an effect (deck transformation) that
practically BEGS the spectator to say, "Hey, let me take a look at those cards!", and naturally you
have to refuse, since this deck is obviously unexaminable.
So why show this effect to
Why show this effect to anyone? Because it looks like magic - that's why! And that should be the reason any effect should be done. Yes, the method(s) involved are known to those who have worked with cards. But the methods are secondary - the effect is what matters.
I will never forget the amazement I felt when I first saw a MP deck demonstrated at the Disneyland Magic Shop many years ago. And that's one of the reasons why I still perform the effect today.