We are HAL and Celebrity veterans and were a little anxious about carnival, but chose them becuz of itinerary, etc. I booked 4 cabins for 6 adults and 3 grandkids ranging from 15-21. We booked balconies and later upgraded to suites for a fee offered by carnival right before the cruise. We were all very surprised and impressed with the service, food, cleanliness and friendliness of the staff.
the common areas décor is a little over the top and garish, but the MDR and staterooms were fine. Made use of the adults only serenity pool and bar and that was great.
Tipped the headwaiter and room steward ahead of time and received excellent service. Some weather problems caused cancellations of excursions but they couldn't control weather.
lots of room, plenty of storage and spacious balcony double sink vanity plus dry vanity.2 closets and lots of drawers.