A couple of years back (shortly after her refurb) we had a sizeable group of CruiseMates readers on the Century for New Years. I honestly don't think she stands up well against her other cousins in the Celebrity fleet. Also, because she only does short runs, I think it's very difficult to look for, and compare it to, a luxury cruise.
On that cruise we too booked out Murano for a dinner. It was very good, but fell well short of similar venues, like Celebrity's own Olympic. Hope you and your group enjoy it though. Be good to hear your experience.