Jeff's right, the real hard value of X is yet to be determined. However, interest in this coaster has exploded, giving SFMM the kind of publicity that they don't even have to pay for. I'm sure this is of far more value than the initial price tag of the ride. Without the blockbuster potential of X, the park would be looking at a recent death in their park, as well the disappointing delay of Deja Vu. X throws all of that into the background, showing flashes of brilliance before the vertical construction has even been completed. Now *That's* value.
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"Quite simply, our goal was to create the single most frightening thrill ride on the planet" -Arrow Dynamics on X.