We just returned from 7 days on the Oasis of the Seas.
Would first like to mention that Springhill Suites in Dania Beach is a great place for pre-cruise lodging. Free shuttle to/from the airport and cruise port. Free breakfast, free wi-fi, and very affordable. And I believe you can leave your car there during the cruise if you drive to Fort Lauderdale.
I was worried about such a big ship, so many people, etc, but had a great time. Embarkation was well organized despite the throngs of people. Ship is beautiful and the staff couldn't have been better. But it is BIG, and walking from one end to the other is a hike. We had an outside balcony on deck 9, and it was quite adequate, although a bit smaller than on other RC ships. We were on the starboard side, and were always on the "view" side when entering each port. I would suggest a cabin mid-ship to avoid too many long hikes.
The cabin was typical of RC outside balconies. Not sure why is was labeled as "superior". It was a tad bit smaller than the same room on other RC ships, but was quite adequate. I liked that it was on the starboard side as this was the "view" side of the ship at all our ports.