The short review:
Ten of us on the brand new Royal Princess. Grandparents taking a son and daughter, their spouses, and their two children each to the Med. Two 13 year olds, and two 15 year olds. First visit for seven of the eight others to Europe, so we chose a new ship for old sites.
The kids and their parents enjoyed the cruise and the excursions, the ship was just so-so but the staff were excellent.
Excellent bathroom, adequate storage space for hanging and drawers. Very small and inadequate balcony. Not much sitting space. Convenient location to the Concierge Lounge, and to the laundromat.