We just returned from a wonderful Southern Caribbean itinerary on Celebrity's Summit. Overall we believe it is a half step up from RC and Carnival. This is not faint praise as we have greatly enjoyed all of our cruises. We booked one of the "sweet sixteen" cabins on the sixth deck, one of 16 cabins that have a balcony twice as large as other regular balcony cabins. (Thanks CC for the tip.)
This review is broken into +, = and -'s compared to our previous cruise experiences.
+'s First the pluses. You are treated like a valued guest. You do not have to sign out towels, listen to endless PA announcements or seem to be constantly waiting in long lines for food and especially during embarkation which we sailed through .Debarkation was also a pleasure. The limited smoking, especially on the balconies was a big plus for us. In the future it will be hard to book a balcony on cruise lines that allow this.
Our sweet-sixteen cabin was great! The luxury of a huge balcony was wonderful. It would have been nice to have lounge chairs. The cabin itself was in OK shape. I don't believe the refurb spent too much time or $'s on this cabin class. Don't pick the first 6 cabins of these 16's.