We have cruised on the Millennium many times. Yes, it is now an older ship. The experience is great. The crew works hard to make sure everyone has a great vacation. Celebrity policies favor the passenger too. Want to have fun.
The Captain was always available to the passengers, walking around greeting passengers and inspecting the activities. The cruise director works tirelessly to make certain the entertainment and activities are top quality. The waiters always check to make certain you are happy with your meal and are ready to exchange it if you are not happy. I was always happy.
The room steward tries to adjust his schedule, so your room is always fresh and clean.