The 3,080-guest Ruby Princess may have sailed out of 2015 and 2018 dry docks with several features found on newer Princess Cruises vessels, including Salty Dog Gastropub and Slice Pizzeria, but even with the updates this ship still has a somewhat old-fashioned feel compared to the cruise line’s glitzier Royal Class ships. Accordingly, Ruby Princess attracts cruisers who are looking for a more traditional cruise experience.