Overall, the Marina is a lovely ship and we were very pleased with our experience. Let's start with the good stuff:
Cabin--very attractive and comfortable veranda stateroom. Bathroom was a bit cramped, but the bed was heaven.
Food--Oceania markets itself as a foodie line, and they live up to their billing. The food was great in every venue (except Polo Grill).
Service--great! Staff was attentive and friendly.
Public areas--on the whole, very attractive public rooms and very clean and well maintained.
Library--very cozy with a great selection of books.
Bon Appetit Culinary Center--we did do a cooking lesson, and what fun! This is a great activity!
Now some mixed reviews:
Sommoliers--Oceania makes a big deal out of having sommoliers all over the place, but most of them knew very little about wine. They were very nice, but not very helpful.
Entertainment--this was a mixed bag. The pianist and string quartet were excellent and a pleasure to listen too, but the singers and dancers in the productions were terrible which brings me too the one public area of the ship that I really did not like, the Marina Lounge, where performances and lectures took place. The colors are dull and the seats are uncomfortable. The rest of the ship is really pretty (although the Casino bar is a bit vulgar, but it is in a casino).
Early closing times--the Marina kinda rolled up the sidewalks a little early in the evening. Longer hours at the pool bar and the coffee bar would have been nice.
And some real complaints:
Excursions--very over-priced, book your own.
Laundry--it should be free to do your own laundry at these cruise prices.
Overall, I was really happy. Live and learn about the excursions. I would book another Oceania cruise, but book my own excursions and skip Polo Grill.