I have only ate at Backlot Express and Pizza Planet. I have liked both. They are both general theme park fare though.
The pizzas at Pizza Planet are good and, to me, taste the same as any other CS pizza in the World anyways. Though I must say the crust itself is very blah, but added the sauce cheese and toppings, they are pretty good.
At Backlot Express they serve burgers, chicken fingers, and I think hot dogs (among other items). I believe Backlot has one of the largest toppings bars in the World, so that is always a plus. I didn't eat there my last trip, but the previous one I had a salad and it was very good.
My mom and sister ate at the Flatbread Grille or whatever it is called. They both liked it a lot. My mom loved her pulled pork sandwich (though complained because she wanted BBQ beef instead) and my sister enjoyed her chicken wrap.