DH and I got back a week ago from a 6-day trip (just the two of us) and DDE saved us $109 (plus the sales tax we would have paid on higher amounts), so we are well ahead of the $50 investment. We used it at Kona Cafe for breakfast (twice), Boatwrights for dinner (never again) and breakfast, 'Ohana, Boma & Wolfgang Puck Cafe for dinner, GF Tea, Chefs de France for Lunch, Le Cellier for dinner and Mama Melrose for dinner. Also, it was good at the POFQ food court, so that saved us a few bucks on fruit, drinks & snacks for the room, plus one lunch.
Since we enjoy our drinks, we saved a bundle at Tambu Lounge, Victoria Falls, Rose & Crown & River Roost.
When we go back in October, we will have 12-20 family & friends along, so we will save a ton more.
When we consider the savings of our APs, DDE and Magical Express over 3 trips, we are very pleased!