We really like the quiet atmosphere of Oceanic - very few children, not a lot of loud music. The pool area stays relatively quiet.
The food is, for the most part, very good - especially in the specialty restaurants. We had the wine and beer package, which allows beer and wine by the glass at meals. It was adequate. I would suggest they add a couple of WBTG at each restaurant to complement the food.
Our cabin was wonderful - Penthouse Suite. Roomy and comfortable. Rahul the butler and Danelia the housekeeper were friendly and efficient. You get hors d-ouvrves each afternoon, which was nice, but they weren't great. The only noise from above was late at night, and it was minor.
Every stop on the Iberian Quest itinerary was fabulous - just beautiful. However, Oceania's excursions can vary in quality. We had some very good ones - Cadiz, Provence - and one unsatisfactory one. We had booked the spa trip to Granada, but it was changed to Malaga. Also lunch was not provided. Oceania did provide a 25% refund after we complained.
Marina is a pretty ship with great food and service. My observation is that Oceania's passengers are trending older, (I mean really older) so if you want a more lively atmosphere, try another line.
We would definitely return to this area of the world, but maybe on our own or with Celebrity.
Really nice - comfortable bed, large balcony, good storage, ample bathroom. The only thing I would add are more accessible outlets for hairdryers. There is not one in the bathroom, and the only other one is under the TV. Kind of inconvenient. Lots of nice perks such as free laundry, canapes, etc.