We've always enjoyed good food and good service at Planet Hollywood.
When I took my god daughter to Disney World (age 11) she loved it.
While you are waiting for food, you can look around at the displays and/or watch the music videos.
Yes it is loud but at least it's with music (or during the day movie clips). Most disney restaurants are loud with "people noise" - talking, yelling, crying, plates clanging, silverware banging, etc.
The appetizers and desserts are awesome and it has one of the more extensive menus (lots to choose from - their LA Lasagna is great).