I disembarked from my Anthem of the Seas cruise a couple days ago. Masking compliance was good. The Coco Cay Beach Club was practically empty (well under 25% capacity).

From my perspective, the only negative in comparison to my November cruise on Princess (see post #2 above) is that testing was required to be arranged for individually in the 2 days prior to boarding (Princess tested all passengers at the cruise terminal immediately prior to check-in). While testing at the terminal has the downside of not knowing that you will pass until you are trying to board, the downside of individually-arranged tests is the added stress of waiting for the results. My traveling companions were promised results within 24 hours (so ~28 hours before boarding), but did not get the first until 6 hours before boarding; the last was received about 2.5 hours before boarding. In my case, I took my test in the late morning 2 days before and was told that I would receive the results that evening; when they hadn't arrived the next morning I went back to my test site (very inconvenient) to collect my results in person before taking AmTrak to Newark the day before embarkation.