We just returned from our 72 cruise over some 45 years on most major and some extinct cruise lines. This was our 6th cruise on Celebrity and the total cruise experience on the Equinox met or exceeded our expectations in all but two areas - overnight in Cartagena and concierge cabin.
Embarkation - process was professionally handled and within 20 minutes we were being served mimosas in the grand foyer. Our cabin was ready by 1:15.
Our choice of select dining enabled us to dine whenever we wished depending on our activity schedule for each day. The service and food in the main dining room was excellent so we felt no need to dine in specialty restaurants. People have expressed misgivings about selection, temperature and quantity of food, etc. and my advice is explain to your wait staff what you expect and if you aren't satisfied ask for the supervisor.
We have had concierge class previously on the Constellation and found this cabin to no larger than standard balcony