just back from a nice carribean cruise on the quantum; first the positives; 1; the ship is beautiful; 2 our interior stateroom was lovely, plenty of room ,great storage and super virtual balcony; 3 the show mama mia was again super; now ,the other side which we knew was coming over 6 months ago; the dynamic dining was not dynamic; we couldn t get our dinner times online, restaurants and showtimes we wanted; after we booked what was available and not good, rccl canceled have of them and told to rebook; we tried again and some times were worse; we then called a rccl agent and they could not do any better ,so they advised us to make changes on ship; we did try after 2 days and made restaurant changes, but most times not available except for 5:30 or 9; not good; between dinner, shows and back to ship late this was very poor and disappointing; next we found the use of tablets for info from staff useless, because they could not answer the question unless it was in the tablet; such as, what are some good beaches ; where is the pointe du bout ferry? they did not know; fortunately we always do research before a trip, but a little extra knowledge always helps; staff not always friendly; we were told to go to the tourist center there; there were no port talks before the port except for san juan; the entertainment was a little strange in 2 shows, but interesting; we definely prefer traditional dining times, showtimes as in the past and shows that make better sense than sonic odyssey and starwater, but they were entertaining; overall still an enjoyable cruise but we will always go with the traditional dining and showtimes;