Neither my wife nor I have ever tendered a review but we just completed our second cruise with Oceania, both with Owner's Suite accommodations and felt that we now had a sound footing for doing so. Our first cruise with Oceania was while cruising on Insignia around South America; the latest with Nautica on the Sydney to Auckland run.
Oceania is a stellar line and Insignia and Nautica are fine ships -- but given Oceania's advertising and market niche, one would expect no less. The things that are uniformly superb are the suite and verranda; butler service and pampering; the fitness center (given that these are small ships); the staff; and the embarkation and debarkation as well as at-sea organization.
While we have already booked another Oceania cruise for the Baltic this summer on Regatta -- again in the Owner's Suite, we think it appropriate to point out defects that we have noticed on the 2 cruises. (Since Insignia, Nautica and Regatta are carbon copies of each other we expect that we will encounter the same defects on Regatta).