(I´m Swedish. More of a 2*-man, than 5*) Cruising ranks low, when I plan holidays. Nevertheless I now and then cruise. Hithertho always with different lines (RCCL,HAL, Costa, NCL). Oceania was a step up. In many aspects.
From outside Nautica looks rather plain. Inside impressing. Beautiful public areas, cabins, and dining rooms. I was very surprised that on this little ship had more space for myself outside my cabin, than on any of the three to five times larger ships I have been on. You could always find place to sit wherever you wanted.
Now bit for bit:
I loved the cabin. Perhaps a bit tiny, bur perfect for us. Comfortable sitting group. But try to gef a cabin where the sofa-sitters looks forward. Not here. Beds best I´ve had. Sea or land-hotel. TV far from HD.