we did breakfast and were on Dxdp - I'd agree with pp that it was a waste of 2ts credits (would rather have done the dinner with the credits), but if paying oop go for the cheaper option because you're really paying for the location and not the food.
cool eating in the castle, but very crowded tables (uncomfortably so). for breakfast it's jsut scrambled eggs, sausage and pancakes as I remember or you can pick a fruit plate - it's quite expensive for the quality of food - Akershaus is a much better eating experience with a much better price (or only 1 ts).