Hi Jennifer,
We did it in 2005. I don't know if it has changed since then but here are my thoughts:
For the most part it is an adult experience. There were characters in the waiting area, but once we got inside the World Showplace there was low lighting and a strolling guitarist. I don't mean to imply there were no children there (in fact, there were plenty of children there!), but there was nothing to keep them entertained inside.
There were many food stations, some set up with breakfast foods like waffles, bacon, and eggs; and others with lunch foods like carved meats, salads, and side dishes.
It's a pretty expensive meal but we enjoyed it. Our kids were teenagers at the time (17 and 15), so we didn't have to worry about keeping them entertained.
If you have any other specific questions feel free to PM me and I'll try to answer them.