We used them in August at the Concourse Steakhouse, and at Alfredo's in Epcot's World Showcase. In fact, we always use them there.
What we ordered at Alfredo's:
Adult: Antipasto All'Italiana, Trittico di Pasta, Large bottle of Pellegrino, Dessert sampler
Child: Ribollita al Tartufo, Le Originali Fettuccine All'Alfredo (kid's), Large bottle of Pellegrino, Dessert sampler
Other (non voucher): coffee
What we ordered at Concourse:
Adult: Shrimp Cocktail, 12 oz. Kansas City Steak, soda, dessert sampler
Child: Fried Crab Cakes, Grilled Chicken Breast, soda, Haagen-Dazs Vanilla/Chocolate Ice cream
Other (non voucher): Five-Onion Soup, Mixed Green Salad, beer
Our party consisted of 3 adults and one child. We never have any problems with these (unlike the Quick and Casual). I know some people have had problems with the children's voucher at Le Cellier. My niece talks about these two dining experiences all of the time (she is 12 now), and how she wants to go back. We used a coupon from entertainment.com for Ghirardelli as well - buy 1 get 1 hot fudge sundae. I just signed up for the free online trial right before we left, and printed out the coupon.
Hope this is helpful!!! Have a great trip!!!