I have done this and can share. We had it last year and had a blast. There are over 10 buffet lines scattered about the entire DLH ballroom. 3 of them are Kid's buffets. We were quite satisfied with the food we had, as well as the experience.
Since many folks have expressed concern about the kids, I'll start there. The kid's buffet was cool. At kid height tables, there were mini "bagel sized" pizzas, mac and cheese, mini corn dogs, pasta, salad, chicken nuggets, and a variety of other "picky kid" foods. They even had their own dessert tables, with dirt and worms, cookies, and other items that I have to look at my photos for. My girls thought it was pretty cool.
There were 3 hot stations - 2 manned. Omlette and waffle and carved meats (with amazing sauces), plus a hot line of chaffing dishes. The cold stations were done as a square on one end - with 4 separate lines. One salads, with freshly made ceasar to order, 2 lines for antipasti and cheeses - organic with gourmet accompaniments like honey and such, and 1 for seafood - lobster, snow crab claws, king legs, and smoked salmon with bagel accompaniments.
The dessert buffets were awesome, including manned stations for bananas foster and strawberry crepes to order, as well as a chocolate dipping tower.
One of the bonus features of the buffet is the character meet & greets. Unlimited access to the Princesses, as well as most of the Fab 5. The photo op areas were beautiful - they even brought in Cinderella's carriage - the one they use in the parades and for weddings. Snow White had the cottage and Magic Mirror, Sleeping Beauty had the castle, and Belle had a garden. Minnie and crew were at the other end of the ballroom with a more generic and pretty backdrop. Lines were shortest during the early part of the meal and got longer nearer to dessert. They are still controlled by the number of folks in the room.
There was a TV and photo op for entertaining, while waiting for your table to open (as well as full beverage service for everyone - coffee, juices, teas, cocoa, etc). When you are called and taken to the ballroom, you are shown your table and after you place your drink order, you have at for as long as you want. Mimosas and/or champagne come with your meal and self-parking is included.
If you keep checking
www.disunplugged.com (the official blog for disboards), at the end of this month, you will see my blog of my experience, along with a ton of food photos.
I know it's expensive, bujt it really is a great family experience!