Cruise line: Regent Seven Seas Cruises,
We stayed in a "Deluxe Suite". The cabin, even in this "lowest" category was spacious, with a walk-in closet. The only problem was the combination bathtub/shower as it was fairly compact.
Some of the cabins have showers, and my understanding is the rest will eventually be converted, but if I sail on the Mariner again, I'll definitely try to get one with a shower only.
The restaurants on the Mariner are the main dining room, the Compass Rose, where no reservation is necessary, and three specialty restaurants, which require reservations. On this cruise, La Veranda became Don Vito's, an Italian trattoria experience that was a popular feature on the Diamond, at night. Signatures has a French menu, and Latitudes has a set course Vietnamese/French menu. All of the restaurants have excellent food and service, and there are no extra charges for eating anywhere. A fine selection of wines is offered at all times. The entertainment onboard consisted of production shows, comedians, a magician, singers and other musicians.
For us the Caribbean ports were secondary to life on board. We signed up for a two-week cruise on the Navigator (after I checked out the shower situation) next year.