As experienced cruisers, we enjoyed many aspects of our first Oceania cruise on the Marina in March, 2011. The food, the service, and the decor of the ship are much as described by other travellers. We were surprised to enjoy the nightly entertainment as much and even more than many other, larger ships we've sailed on. The ports were fantastic, although we booked almost everything independently due to the limitations and the cost of the offerings of the ship.
We would like to advise that cabin 9005, a concierge-level cabin, was extremely noisy at night with so many thumps, bumps, crashes and jolts that we finally had to move to another cabin on a lower floor. The seas were not exceptionally rough and certainly we have been in a variety of weather in our nearly 20 cruises, but we suspect that since cabins are put into a ship, during construction, as a whole unit, there must be something structurally lacking in 9005. We had never experienced anything like it and sleep was out of the question.
We made our concerns known after the first night and happened to hear someone from another deck, voicing the same complaint to the registration desk -- the noises and jolts were enough to bring one up out of bed! We were all met with limited concern and the advice that if it happened again, we should call the desk right then and there. Not particulary reassuring. The second night we experienced an identical problem, called the registration desk at midnight, were met with casual concern but persisted, and were finally successful in getting moved on the third day. Our new stateroom did not have any of those sound and movement issues.
Despite the luxury of the ship and its many good points, the rooms are not that well constructed, with chips in the "wood" of the closets and cupboards already (our cruise was in the second month of Marina's existence), bathroom tiles that let water seep through the grout of the floors and walls (noticed that in both staterooms and our room steward said it was a problem ship-wide), and flimsy walls that do nothing to keep the next room's conversations inside that room -- especially if you happen to be in a stateroom that could be an adjoining room. The closets rattled, the showers have been discussed enough already, and the balcony doors did not always open easily or close completely, despite a lot of effort.
We especially wanted to warn people away from choosing cabin 9005. We enjoyed the rest of our cruise, but the construction issues are probably enough for us to avoid taking another chance on Marina.