We did sail on the Century after the re-furb and it was great there were a few minor problems still unresloved but in 4 weeks they had added well over 300 new balconies. The service and the food was a good on any of the other Celebriaty ships and we have sailed on them all barring Constellation and Summit.
They spent $55million refurbishing her - how can she be tatty? The last 12 reviews I have read all awarded her between 4 and 5+ which seems pretty consistently high.
My wife and I were on the Century in 2005 (Baltic) and 2007 (North Cape). Apart from the added balconies and new speciality restaurant we didn't really notice any difference. Although we are cruising on the Azamara Quest this year we wouldn't hesitate to cruise on the Century again. John.