The Method and Mystery are superfluous snowboards. They are less about catering to riders and more about the level of R&D that can go into a snowboard.
It probably rides great. I know the Method was super duper light and expect the Mystery to be no different. However, the Custom X and Vapor are plenty light themselves if what you want is a stiff, damp, light board.
Personally, I can't say I would buy it even if I were rich. There's just so much you can get with that money. We're talking an entire setup - board, boots, bindings, jacket, pants, and gloves - for that price.