The Oasis class ships are themselves a destination, sort of a floating all in one resort.
Embarkation (getting on the ship) is stress free and takes little time. It should be obvious that you need to have completed your registration and have your passport but you would be surprised how many people forget.
The ship is a sight to behold and you have to see it to believe it.
The number of passengers was never an issue and we have been on smaller ships where you have to wait for elevators and deal with crowds for the shows etc, it is what you would expect on any large ship. Making your reservations in advance for the shows is just prudent planning.
If you have never been on a cruise before you need to understand that the cabins are smaller than a typical hotel room (including the bathroom) but everything is designed to be highly functional and if you want lots of space you need to spend a significantly large amount of money for a suite or avoid a cruise.
The buffets is more than passable in terms of quality and yes that does get crowded but no annoyingly so. If that is an issue the main dining facility is available. With regards to the main dining facility we have never in all our years had unacceptable food. You need to remember that cruise ships are serving a large number of people and more so on the Oasis but they deal with that with a high degree of competency and expertise. The separate special (fee) facilities are nice and it is up to you to decide if you want or need to up charge yourself for that experience. Regardless, the food on the Oasis was in general very good and we never have superb expectations on any cruise ship.
The entertainment was excellent and diverse,fun places to go every day and night. We never talked to anyone who did not enjoy the shows.
The casino is the usual fare and the bars numerous and all have great service and the price less than you experience on shore.
The prommonade, boardwalk and central park are just marvels of design and you have to shake your head to remember you are on a ship.
Above deck finding a place near any of the pools or on the sun decks is not a major challenge but you are not at your local club or in your backyard so some patience and walking around is necessary. We never though finding a place to plop down was an issue and certainly not anymore difficult than on a smaller ship.
As we have found on all cruise ships, the service is commendable and no less so on Oasis.
Certainly there is a premium charged for the Oasis class ships and we found it worth the price. Over the years we have noted that all the newer cruse ships have slightly reduced the size of the balcony and that is true on RCI but again not objectionably so. Regarding the balcony on other ships we always insisted on a Ocean balcony but on Oasis we opted for one overlooking Central Park, it was quiet and charming. If you have a lust to see the water that is never an issue.
It is important to note that this is a huge ship and getting from point A to point B while not difficult does need to be considered, again not a problem but just not a short stroll. There are layouts of the ship made available and keeping them around in your room is a good idea but there are interactive maps in the halls next to the elevators.
As I stated in the title a bit long and I hope useflu.