I did the Frozen dessert party (and the HEA, and the Star Wars).
I'd rank it in second place of the three I did. The food selection was fine, but that's not why I booked it. The alcohol wasn't to my taste, but that's not why I booked it. The view was terrific, though I hear there are other great places that you can find without needing to book a dessert party or use up an FPP. We had a small table, right on the lakeside, with a central, unobstructed view. Getting to walk straight onto Frozen was terrific. It was much more fun than I was expecting the ride to be.
Worth it? I'm British and when I spend money in the US on holiday, its value loses all meaning to me. I just can't take $79 seriously. It sounds like Monopoly money. Because I remember the 1970s when you could get at least $2 to the pound, I still tend to halve the price in dollars and think that that's what I'm spending. It's actually the best part of £60. And then there's probably tax on top. Wow. Did I really spend that much?
This was a once-in-a-lifetime trip for me. I didn't want to cut costs and miss out on great experiences for the sake a few (OK, a few thousand) dollars.
So I have no regrets. My only complaint was that the whole thing was outdoors. On a very hot, very humid day. And I wasn't clear where the party actually was, so by the time I got there I was hot and sweaty and stressed out and expecting air-conditioned bliss.
I had to share a table with strangers, but they were friendly strangers so that made it even better.
(The Fantasmic dessert party wasn't a thing when I was there. So I did the Fantasmic dining package, which was terrific value for money. Amazing seats. Though I'm not sure any of the seats are actually bad seats.)