I think the food at 50's Primetime and the Brown Derby is great. Disney has some truly
amazing places to eat, if you're single or a couple without kids/with older kids you could park hop and go here and there and eat at only
amazing restaurants on your trip.
Those of us with kids have to consider convenience, practicality and the experience for mom and dad.
You could go to Disney and not eat at any of their amazing restaurants just the great ones and still have a blast!
That being said, there are a couple of great choices at Hollywood Studios.
We ate at 50's Primetime on our trip in Oct and my son (6) thought it was funny that "now we were kids too" as we were being scolded for not finishing our dinner. I love the "home cooking" at this restaurant and the milkshakes!
We have an ADR for Brown Derby for our trip this Dec just because I thought my parents would enjoy the food there and we haven't been in a while. I think Brown Derby is
great and our son enjoyed his dinner too.
A couple years ago we did dinner at Sci-Fi (where I find the food to be just okay) and my son will still say "Hey mom, remember that time we ate in that car at the movies?" Best of luck in choosing and have fun on your trip.