Nowhere near worth the exorbitant pricing. Even with the slightly less expensive Gen 3 Alpha Turbo, there is almost no prompt adherence, even if you follow their prompting guide.
And given the extremely high expense, most users won't have the freedom to experiment in order to find that just-right-magical-prompt-wording that will yield any result that even approaches accurate. Even with start images, where most of the work is done for them, the resulting video is disappointing 9 times out of ten.
Not worth the money at this time.