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.
All the extras like the Aqua theatre, Central Park, Boardwalk, large promenade were a real pro. Our balcony state room overlooked Central Park. We actually liked this type of cabin more than a Sea View Cabin, because it was really lively all day and evening.
The Solarium Bistro restaurant was an excellent venue for us, because we like healthy food and there was a very relaxed atmosphere and beautiful furniture. The gym was much larger than on other ships. Also the Vitality Cafe was a very nice extra with healthy juices and very friendly staff.
It was a great experience and we will definitely cruise with Oasis or Allure again in the near future.