We, a Dutch family, went on the 9th voyage of the Oasis of the Seas. So everything was brand new.
We were amazed by the size of the vessel. It looked more like a city. It wasn't difficult to find your way around the ship, because of all the interactive screens in the corridors, that had a navigation system. Even though there were over 5000 passengers on board, we didn't have the feeling that it was crowded anywhere.
One item we didn't like was the design of the main restaurant. Because of the enormous capacity, the intimate atmosphere wasn't there. There were several "hidden" corners, from where there was no overview of the rest of the restaurant.