We love the theatre and and the starlights lounge on Oceana. The staff always seem happy and friendly. Cabins are smaller than some ships, but perfectly adequate for a 14 night cruise.
The public rooms and bars are good, and it is easy to find your way around the ship as you can walk all the way round on most decks.
The best feature of the ship is the Atrium, which is much more attractive than on other ships.
Overall, plenty of positives and no negatives I can think of.