Hi Mary, Sorry, I haven't been on either ship yet either. (We will be on the Mille in October though, so if you have any questions about her then, just ask.) But for what it's worth here's my opinion: I don't think you can possibly go wrong with either of these choices. I really doubt if there will be much difference in the cruise experience on these two ships. The Century always seems to get excellent comments on food and service and decor, but so does the Millennium. . And the cabins sizes are about the same, according to their catalogue. The only factors I can offer for you to consider as you make up your mind are these:
-The Mille is bigger (Mille- 91,000 ton vs. Century - 70,6006 tons)
-The Mille is newer ,( Mille - July 2000 vs. Century - Dec. 1995)
- And the Thallasotherapy pool is free on the Mille while it is a charged for use item on the Century. (Back in '99 it cost $10. per day or $50. for the week to use the Thallasotherpy pool on the Mercury. I would guess that it costs more now).
-I also tend to think that the Mille would be less crowded considering it is almost 30 % larger than the Century but holds not even 12% more passengers. (M- 1950 persons vs C- 1750 persons )