Having been on an older, non-refurbished Carnival ship (Victory, in 2011), I was happy to see that the Breeze had a new, less tacky design. Different areas of the ship had fun and appropriate theming, such as the Piano Bar, Bonsai sushi restaurant, and Limelight Lounge, to name just a few.
Pros: Our cabin was small, obviously, but very comfortable and a great value because we spent more time outside of the cabin than in it. I prefer sleeping in total darkness, so interior cabins are both practical and economical. Wan, our cabin steward, was friendly and cleaned our room twice daily. He also made sure we always had ice.
Cons: I wasn't a fan of the cabin's location - being so low and towards the aft meant our room loudly vibrated for roughly 20 minutes every time we entered or left a port. Even deep sleepers will notice, so it's something to keep in mind. Also, (and this might have been a one-off thing) we asked our room steward to empty our fridge on the first night, as we brought on a 12-pack of soda. He said we would need to empty it ourselves and just keep the for-purchase items on the shelf, because he didn't have anywhere to put them. I thought this was really strange and it resulted in just a tad less space available for us to use for other items. Not a big deal, and we weren't charged for anything that we removed from the fridge since we didn't use it.
Cabin - Overall Thoughts: A perfectly suitable cabin for anyone who uses their room solely for sleeping or prefers saving money for other expenses (e.g. an excursion). Interior cabins are great for people who like sleeping in pitch black. I'd recommend Deck 2 but would suggest trying to book forward or midship, if possible, and avoiding the loud vibrations associated with the aft.
Taxis are expensive, and the locals are aggressive - the woman at the information desk right off the walkway was rude to our group (someone in our group has made dinner reservations at a nearby resort, and the woman said such a resort didn't exist), and everyone seemed determined to send us to the most tourist-y and expensive areas. We finally haggled and got lunch at a great local spot before checking out downtown. The floating bridge was an awesome experience, and I'd love to see more of Curacao.
Lots to do even if you don't have plans - Jack's Shack, Margaritaville, and the free beach all provide ample space and entertainment to cruises. Our group spent the most time at Jack's Shack and loved it.
The port was fine and efficient. We arrived towards the end of our check-in window and were promptly escorted to the right area. Waiting time was minimal/standard. It seemed pretty organized. Our porter was friendly at first but became very aggressive after a seemingly minor incident. (A member of our group tipped a couple of dollars for his luggage, and the porter apparently asked him if that was meant to cover the whole group. Our friend misheard the question and said, "Yes." At that point the porter became extremely aggressive and rude. I then gave him a $20 and said it was for our group, at which time he became a little less sour.) It was organized but the porter wasn't great after the tipping mishap - beware aggressive porters!