Celebrity Constellation receives high marks for its service, itineraries, and overall cruise experience, with many guests praising the friendly and attentive staff, well-organized excursions, and enjoyable entertainment. However, there are recurring criticisms regarding the quality and variety of food in the main dining rooms, the ship's aging condition, and occasional issues with crowding and value for money. While many guests had a wonderful time and would cruise again, some felt the experience did not always meet Celebrity's premium reputation.