We cruised from Copenhagen to Copenhagen in May on the Royal Princess and it was absolutely fantastic. By way of background we are a couple, 27 and 37 years old, and this was our second cruise, and first with Princess.
Ship
The ship itself is absolutely fantastic. The Atrium is huge and amazing, a lovely place to have coffee or grab a snack from the International Cafe or the Gelato shop. We purchased a coffee card which really came in handy - unlimited hot chocolate! All the bars are well staffed and appointed, with plenty of room for all passengers. It was a little cold so didn't use the pools but the pool deck was large and would be fun in the summer! We purchased a pass to the enclave in the lotus spa which included a pool with jets, four different steam rooms and heated stone beds. They limit tickets to only 50 passengers so it is never too crowded. I would absolutely recommend getting this - it was so relaxing after a workout in the fantastically appointed gym!
Great - really high up but people on the sea walk can't see in. Balcony isn't huge but big enough for two people to comfortably sit out there (ignore people complaining about the size - they're just whingers!). Two TVs with on-demand television was great. No noise issues. Plenty of storage for our two bags. Bathroom isn't huge but bit enough with a full bathI loved it!