I had been on 3 previous cruises with Royal Caribbean before I went on a 12 day NZ cruise on Ovatiion of the Seas which is part of the Quantum class whatever that is ( maybe size).
Great cruise apart from the following :-
1. Self flushing toilets in public areas do not always flush appropriately and often flush when you are still 'ahem' seated. Should all be manual flush.
No complaints about cabin. Large enough with nice balcony and cabin staff do a good job calling in twice daily to check room.