Celebrity Millennium receives high praise for its exceptional service, friendly staff, and memorable itineraries, especially in Alaska and Asia. The ship is generally clean and well-maintained, though many guests note that it is showing its age and could benefit from updates. Food quality is mixed, with the main dining room often praised but the buffet and specialty dining receiving more criticism. Entertainment and activities are generally enjoyable, but some guests find the options limited, especially for younger adults. Excursions and ports are highlights, though some logistical issues and communication problems are noted. Pricing is seen as fair, but there are complaints about add-on fees and upselling. Internet connectivity is a common pain point. Overall, the cruise offers good value and memorable experiences, but there are areas for improvement.