Celebrity Millennium receives high praise for its exceptional service, friendly staff, and memorable itineraries, especially in Alaska and Asia. Many guests highlight the ship's cleanliness and well-maintained public areas, though some note that the ship is showing its age and could use updates. Food quality is generally good, with standout experiences in the main dining room, but buffet and specialty dining receive mixed reviews. Entertainment and activities are enjoyable but sometimes limited, especially for younger adults. Excursions and ports are often a highlight, though some guests wish for better descriptions and organization. Pricing is seen as fair, but there are complaints about add-on fees and upselling. Internet connectivity is a common frustration, with slow speeds and unreliable service. Overall, the Millennium offers a solid cruise experience with excellent staff, but some areas could benefit from modernization and improved consistency.