As noted Adults Only, and there were very few kids on board because it was Oct 1-6. Of our 5 prior cruises, 3 were with Kids, and this was a BIG difference - normally we take 7 day cruises, I'll break this down into logical segments as follows: Ship, Stateroom, Destinations, Food, Crew, Entertainment.
SHIP: We had the advantage of previously cruising on Later editions of this Class of ship on Carnival as we have been on the Carnival Valor and Glory before. I didn't look to see if Destiny was the first in this class, but it is certainly an early version and Carnival has made subtle enhancements to this class along the way but overall the deck plans are nearly identical. A few things missing on Destiny were the Valor and Glory had an additional food bar on Deck Ten Aft, and No Drink machines up on Deck 10 dining area (a minor inconvenience).
The common areas are definitely dated, but don't believe those travelers telling you that they are horrible, because they are not. Yes, furniture needs replacing, carpets appear worn, etc. but the crew does a good job of keeping it clean and tidy and as a result we were not put off by it being a little dated. While the common areas will be updated in the upcoming refit, our Cabin had just been done, and we were literally the first to experience it, and we liked the new appointments. New monitors, new cabinets, new furniture (i.e. couch), new bathrooms (however, old deck furniture on the balcony). As we were debarking, more of Deck 6 was being redone and was closed off.