We just got home from a 5 day cruise on Carnival. Here's the good the bad and the ugly, FYI.
I will start with the good. Since we made the reservations just 48 hrs. before cruising, we didn't have any info. nor a boarding pass. When we got to the dock a very nice man took us under his wing and escorted us to the front of the boarding LONG line, since the check in papers didn't have our names. He was most helpful as well as the lady behind the desk, setting up our needed paper work and cabin keys. We then walked right on board.
Then there was more good, the weather was fantastic! The ship sailed well, not too much "rocking and rolling". A very small, too small area for "over 21" quiet time, if you don't mind the loud humming of the ships engines.
Cabin ok, usual size for outside with view. Dirty windows!