I haven't played a FF game since FFX, and have literally zero interest in the titles anymore. Is this genuinely worth playing? Or should I not bother?
Well if you really do have zero interest in Final Fantasy titles then, no, it would be a waste of money.
However, the value of money is vastly different for every person, but the way I'm treating this PC release is: "For the price, buy it."
But to me, it's slightly more expensive than a pack of cigarettes, so I wouldn't feel "robbed" or anything if it's a mediocre port or by the content of the game itself, but of course everyone sees it differently and sees value by different metrics and so on.
If it was a full price or mid price release, I wouldn't recommend it at all, the price was a damn good move on Square Enix's part.
Edit: It's been getting a lot of coverage, greenman currently has a full page advert for it, humble has had it at the top of it's store most days since pre order, and at least here in the UK, it's stayed in the top 20-40 on Steam after holding #1 for a while, SE must be pleased. I hope it really does encourage more JRPG's, by all studios, on PC.