We're sailing on the Conquest over New Year's. We booked a 4A GTY room for our boys (21 and 17) and an aft balcony for us. We found out today, using the Modify Booking method, that our boys have been upgraded to an inside cabin on the Upper Deck....just three doors down from our balcony cabin. Nicely done Carnival!
Ron and Sue
NCL Sunward II
I have found that if you booke a guarantee with Carnival early enough, your chances for an upgrade are pretty good. Not necessarily an inside to a balcony, but they'll move you up within the category. I have heard that some people got super upgrades before like that but are vey rare.
Kudos to Carnival. Althoug I like RCI, too, there upgrades are next to nil.