We enjoyed the 49-day cruise in 2015 and decided to do this 30-day cruise. It is almost the same itinerary, beginning at Buenos Aires, but without Brazil.
Good cruise, especially having Michele Tuvo as the Captain. He is the best we have ever had! He was very good about telling the passengers when there were whales, dolphins, turtles, etc around the ship. The Captain was out-and-about the ship daily and readily interacted with the passengers. He always ends his announcements with "...nevertheless, Bye bye!"
It is unfortunate that Princess does not provide a Bridge Director on cruises any longer. There were 6 sea days on the Buenos Aires to Santiago leg, and 9 sea days on the Santiago to LA leg.
Cabin is category B2. Balcony is about four feet larger than the one below on deck 9 and I think it is larger than the cabin above on deck 11.