I have sailed on Century (twice), Mercury and the Millinium. Of Century and Mercury I felt that Century was a much warmer, elegant vessel and it quickly became my favorite ship (I had been on about 17 cruises before I was on her [RCCL CARNIVAL NCL] ) Then I cruised on Millennium WOW. This vessel took everything that was good on Century and improved it.
Certain features such as the flower shop, the music library and the regular library, the Olympia dinning room and the Aqua Spa just made this ship one of the finest. My wife and I were so impressed that we have already booked a cruise on Summit for the spring of 2002 because she is going to be so similar to Millinnium.