We just got off the Wonder a few weeks ago. When we got on board, I looked at my dining rotation (printed on your Key to the World card), and then I pulled up the app. The app shows the dinner menu for each night of the cruise, for every dining room. So I looked at the menus served each night, found the menu we liked the least, and then made a Palo reservation. I had no trouble getting a reservation for dinner, or for brunch, once we were on board. I can tell you we actually preferred brunch over dinner. Have fun!