The Norwegian Sun receives mixed reviews, with many guests praising the friendly and hardworking staff, enjoyable itineraries, and good value for the price. However, there are recurring complaints about food quality, ship age, crowded venues, and inconsistent entertainment. Excursions and specialty dining are often highlighted positively, but issues with cabin comfort, internet connectivity, and some aspects of customer service are noted. Overall, the cruise offers a solid experience for those prioritizing itinerary and service, but may fall short for guests seeking luxury amenities or gourmet dining.