This was our third cruise, and our first on Celebrity. We selected Celebrity because we heard that it was a bit more "refined" and I think it's safe to say that was the case. There were very few children/families on board, although the families I spoke with were happy with their accommodations and services.
We boarded early in San Juan - we'd spent the night before the cruise in town, so we were at the ship by about 11:30am and on board shortly thereafter.
Our room, cabin 8115 was a 'Concierge Class' cabin with some additional amenities. Overall we found our room to be much more spacious than on other ships we've sailed (Carnival and NCL) with a great deal of storage space. The Concierge Class had some additional perks like upgraded bathroom fixtures and linens which were a nice touch. The daily canapes delivered to our room were OK but could definitely be upgraded. Our cabin steward was very thorough and prompt, and kept our room looking wonderful. The concierge class cabins also have a more comprehensive room-service breakfast menu, although we preferred to eat breakfast elsewhere since the room service food was not always the right temperature.
Our cabin had a balcony with a nice un-obstructed view, a king bed and a sofa-bed.