I did the “behind the scenes tour” (pricey at £80 but very interesting) and found that they just over 4000 passengers on board - but the ship seemed ultra busy and crowded
When the shows finished at 9.40pm it was almost impossible to get a seat in the bars around the ship. This became such a problem that as the performer(s) were finishing their act people were rushing out the theatre which was disconcerting for both the audience still watching and the the singers/actors on the stage - just to get a seat afterwards.
As others have mentioned, you’ll find you need to queue at the bar by both the pool and in the Market place buffet. There ARE waiters in both areas but not enough to cope with the numbers.
Big for one person with plenty of space although the storage may be pinched for 2 people. Tip: take long dresses on wire hangers and hang them off the hooks by the cabin door (they can hang full length and don’t take up too much room)
BEWARE some layouts mean that the television in the cabin next to you, is attached to the cabin wall AGAINST the headboard of your bed. If your neighbour then likes to listen to late night telly quite loudly - you’ll definitely hear it too (I’d have thought the design should be the same in each cabin so the telly;s are against each other)
Take your own toiletries - very basic shampoo, soap and body wash are there - no extras such as flannels, bathrobes or slippers so remember to bring your own!