Collectively, my wife and I have been on over 40 cruises and this was our favorite. The Paul Gauguin's itinerary - Society and Cook Islands - was arguably a bit better (hey, we're talking the South Seas!), but for overall service, food, layout and ambiance, the Viking Sea wins.
The ship itself is a dream. It's beautiful - outside and in. The clean lines and sharp bow make it a very pretty ship, but it's the interior decore and layout that are the real winners. At times the Nordic look can be somewhat austere, but I'm a fan of the uncluttered look and functionality of same. The ship was full and at no time - even on the single sea day - did we ever feel crowded or that there wasn't a nook you could escape to.
The cabin was well-appointed (we had a deluxe veranda) with a ton of electrical connections and USB ports. Could have used more drawer space, but this was countered with a very large closet, so it was a wash. Bathroom was big and bright with a lot of storage. More ventilation would have been a plus; it could get close and stuffy with the door closed and the floor heating on.
Well laid out. Ample storage. Nice balcony, but seldom used. Bed was very comfortable with great linens. Tons of electrical and USB connections. Two chairs, stool and a padded table that can double as a bench. In-room ventilation was great, but bathroom can get a bit stuffy.