Let me preface by saying we have a DS and we took him to Akershus because my DH and I really liked the food. It was a chance to eat some varied styles of fish, chicken, or beef. That being said, this place has gone from being a "must do" to a "maybe we will do" next time. Mostly because the last time we went for dinner the food was just okay. My DH food was super salty. My DS meal of Mickey ravioli was almost had no salt and was bland.
The princess interaction has always been great at this location even for a DS. I have a friend with a DD who loves Ariel and she was really excited to see Ariel as a human instead of as a mermaid. All the princesses do a great job engaging the children.
I like the cold buffet but some people do not enjoy it because it leans towards seafood and salad (shrimp cocktail, herring, specialty salads--potato and macaroni).
Family style desserts are always yummy. We can never finish them because we have eaten so much of the cold buffet and entrees.
Hope that helps with your decision.