The Norwegian Sun is a lovely ship, recently re-done. Itinerary out of Canaveral included only 7hrs in Key West and 1 full day in Havana.
Felt check-in should have gone faster since we were assigned a time. Long lines in the terminal. The ship was great, newly refurbished. Cabin was quiet and bath was spacious. Steward excellent.
Food choices (free-styling) very good. Staff in the two dining rooms were competent, but not very welcoming or friendly/happy. Service at buffets better, more attentive and helpful. Lounge choices good, but wait staff was hard to find, and often didn't return to table.
Loved the cabin. Easy for 3 of us to live in. Needed 1 more chair for the balcony so we could all enjoy at the same time. Very quiet. Loved being on deck 11, easy access to the pool.
NASA is a great museum and Ron Jon's is a local icon; but both are a hike from the port.
Loved Key West. Just do the Hop on/off bus and stop at all the landmarks.