Hi Josie,
Well, as I said in my review, I felt that Wong's time of introspection (which led to the creation of his deck) is reflected on how the deck reads. He created the deck because none of the ones out there worked for him, and he wanted to explore the depths of his psyche. To me, this is a hallmark of a deck with "depth". That is, having one's psychological and spiritual process inserted into deck creation as opposed to creating a deck just to make a name for yourself in the publishing world.
I was bowled over at the test reading I did with the deck, actually.
The Gilded Tarot, in my opinion, fits the bill of making a deck creation just to fit a niche. If I understood correctly, LLewellyn Publishing contacted Ciro Marchetti (who will soon be out with a self-published deck and CD) to make a deck. While he is an amazing artist (one of my favorites, in fact) the deck is a shallow one lacking symbolic and intuitive depth.
Of course, some decks just don't "speak" to a person, which is a given, but it doesn't mean that it lacks metaphysical depth. Ultimately, what matters is finding a deck that resonates and yields immediately accessible information.