We ate there twice. We were underwhelmed both times. We just weren't that impressed to justify the two table credits. Yes, it was neat to say you ate in the castle, but again, it just wasn't all that wonderful that it was worthy of using up two credits (for us anyway).
My daughter actually liked Akershus better than CRT on both of the trips--and still does. The food at Norway is actually very good. The cold bar was yummy and every entree I've had there has been great! You have a castle feel in Norway and you get to see plenty of princesses. Also, there is photos included w/ your Akershus meal too (as there is at CRT too).
For us, we prefer to eat at Akershus.
Also, we loved 1900 PF. Such great character interaction!!!!!! The food was yummy too. My daughters both prefer Akerhsus and 1900 PF to CRT. However, you will find others that will have say differently.
If your daughter is truly set on eating at the castle, though, I would consider doing it. What isn't so great for one family may end up being a treasure for another family. You'll never know until you try it!