My parents were looking to take my partner and I on a cruise as we have done cruises with them before and we all have a great time. I am 39, my partner is 45 and my parents are in the 60's. My parents had sailed on Century twice before. My partner and I had previously sailed on the Century shortly after she was refurbished. This was in November of 2006 and I can say that two years later the ship still looks great!
We looked for a 5-7 day cruise on HA, Celebrity, and Princess. Well the rate we got for Celebrity sealed the deal. Celebrity offers a much better experience in my opinion that say NCL or RCCL. I'm afraid to say what we paid because it might let the secret out. Needless to say it was a VERY good deal and you can find some dirt cheap cruises on this ship (and others) if you know how to look.
The Century is a perfect sized ship. Not too big, not too small. The decor is pretty contemporary and it is a fairly easy ship to navigate around. The gym is very nice and the public areas and lounges are a great place to relax and socialize. The staff is very friendly and very sincere in making sure you have a good time.