Pride of Aloha, which pay restaurants worth it. ?



Hello, my friend is taking her mother on the POA in Feb. and neither of us have ever been on NCL.
My friend has also never cruised before.
I understand that on NCL the " freestyle dining" is best if one makes reservations. Also that some of the restaurants are for a extra fee.
My friend really wants to "treat" her mother, and has asked which of the restaurants would be worth booking. She would like to book two or three nights in a "fee" restaurant, assuming that these places would be a step up, or nicer then the "free" ones.

Thanks for any suggestions.