I was on the Rio to Buenos Aires 9 day cruise that disembarked Dec 22.
I'm a pretty experienced cruiser having been on over 70 cruises including now 2 on Azamara, 2 on Oceania, Seabourn, Crystal, as well as a range of other lower price point lines over the past 25 years. I have been at sea for 100 days this year. In my opinion, service by all staff, crew and officers (with one exception by Guest Services) was excellent. In particular, all dining room/buffet staff were extraordinarily efficient, polished and friendly without being intrusive. Heike, the Hotel Mgr, was more hands on than any other 4 striper I have ever observed at sea. She does a great job with staff.
Our cabin was a forward veranda, deck 6 - a standard sized veranda with flat screen and a minibar stocked with free beer, soft drinks and water. Bedding was comfortably sumptuous. Veranda chair and table quite comfortable as well. Pretty much what one would expect from a premium line. We opted out of room service afternoon tea or any other room service for that matter. The daily fruit plate and soft drinks were sufficient for our in cabin needs.