I had UDP on an 11 night cruise on the Anthem which included 6 sea days. Honestly it was too much after a few days. The problem on the Anthem is not enough variety. There's only Chops, Jamies Italian, Wonderland and Izumi (no hibachi offered). There's no lunch in Wonderland, so it was only Chops or Jamies for lunch on sea days. I don't really like sushi so wasn't that interested in Izumi, although I went a couple times. The lunch and dinner menus in Chops and Jamies are pretty similar so it got repetitive quickly and I liked Wonderland but it's the type of place you would only want to hit a couple times over 11 nights. But the cost was only $208 for the entire cruise so I didn't mind too much, at the current prices I wouldn't do it unless there was a lot more choice.