The effect is very natural, when you perform it right, this will be a killer effect among all card tricks.
The down point of the trick is only that you can not give the deck to spectators. But who cares! It's normal not giving them deck, you end the trick clean enough, and no one will ask you to look at the deck.
Also, in this tutorial, he also teaches the red/black version of this trick, which also based on the same principle. But only a little minor change of handling. Because the bonus effect doesn't need a selected card.
Then, a few days later, I looked this up again and heard DaOrtiz' words. It actually touched me and I was immediately captivated by this new style of story magic. I bought it soon afterwards and Dani's teachings were amazing: ranging from the smoothness of his card handling to the brilliance of his patter.
Even if you sort of figured out the effect, buy this: you will not regret it. This is more than a magic trick, it's what Dani said: a "hommage to Dai Vernon". You get an incredible effect and a context that will captivate your audiences to the full extent.