Cruised on the Celebrity Century (Mar 23rd to Apr 5th) and thought a few comments were in order.
The first part of the cruise (touring the Hawaiian Islands) was great except for a main dining room seating issue and one mediocre excursion. We had to get the Restaurant Manager involved to resolve our seating issue and he offered us complimentary dining for two and a bottle of wine in the Murano specialty restaurant. With regards to the excursion we filed a complaint with the Excursion desk and received a 50% rebate of our excursion cost.
The second part of the cruise was not very desirable. Some of what happened (the weather, wind, and rough seas) was not in the control of Celebrity. But other things such as the activities on the ship and the disembarking in Ensenada, MX were in the control of Celebrity Cruise lines.