In the Carnival brochures and on the website they have photos of Category 11 staterooms. These rooms are wide open rooms with bed, sitting area, vanity etc. Fairly typical of what one would expect of any balcony stateroom except with far more room.
The aft Category 11 aft staterooms are totally different, and when I found myself in one, I was quite shocked. The stateroom is a suite of rooms. You first walk into a hallway area, then into a small living room with a little desk and television. Off of that is a little dressing room with closet; off of that is the bathroom. Beyond the dressing room through a door that closes is the bedroom. So it is like a tiny little apartment. The balcony is amazingly huge, even for an aft stateroom.