I have cruised this same ship and itinerary several times ( I live part time in Buenos Aires).
I am elite on Celebrity (and close to Elite +).
In my opinion the food served in both the Oceanview café (buffet) and main dining room has deteriorated. Service by all waiters, cabin attendant (no longer working in pairs - a sign of cutbacks?), bar men, and officers was extremely good, but it didn't compensate for what I perceive to be a significant dropoff in the quality of the food.
Nice standard balcony. The shower was not as good as I expected (poor flow) since they tout the shower in Concierge class.