I have sailed twice with Princess cruises and found the Sun was a little shabby in appearance, particularly the Princess theatre. The seats were in disrepair & so were the carpets throughout the ship., The entertainment was boring, especially the dancers routine which was the same show as the Sea princess a few months earlier.
One of my pass-times onboard is the Trivia & I felt that the hostess /s quite often rushed through the questions & answers and were not very clear. This attitude was repeated with the pool-side games also. I felt like they didnt really want to be there.
Housekeeping staff were fantastic along with the Waiters in the dining rooms & Buffet (Horizon Court).
I dont spend a great deal of time in my cabin but would not share an interior room unless I had a partner. Room enough for me with a queen bed configuration & plenty of drawers & wardrobe space.