My wife and I did a back-to-back cruise out of Miami on the Victory 12/13-12/21. The first loop was 5 days which left port on 12/13 with stops at Grand Cayman and Falmouth. The second loop was 4 days which left port on 12/17 with stops at Key West and Cozumel.
Avoiding the minutia, I will address the things that stuck out in our experience - good and...not so good.
The good.