Our family visited Grand Canyon's South Rim in February 2013 with some friends from New Jersey.
After walking the Rim Trail for several hours in the crisp air and beautiful sunshine, we were all famished and stumbled upon the Bright Angel Restaurant (one of not very many food options along the Trail).
The hostess seemed bewildered by the size of our group and asked three times about the number of our party. 4 adults and 6 children.
I ordered the Wrangler's Chili ($8.50) and was decidedly unimpressed. The sourdough bread bowl was simultaneously tough and soggy - and the chili inside lacked flavor or interest.
Our girls split an order of macaroni & cheese off the children's menu. They typically love mac & cheese (as most 3 and 6-year-olds do), but neither of them ate more than a few bites. After a quick taste test, I could see why. I almost gagged at the gooey artificial cheese and horribly prepared dish.
The "bright" side of this restaurant was the very cool Grand Canyon Activity Book that each child received. More than just a one-page coloring sheet, the booklet included mazes, pictures to color, and fun facts about the canyon.
While the prices were "reasonable" for a tourist trap, the food quality and service at Bright Angel left much to be desired. Until a new chef and management team is hired, I recommend that you pack a picnic lunch instead.