I have listed many good points in my opening sentence, but would also add that the price of alcohol on board was very competitive. I also enjoyed the art gallery, the ambiance of the Metropolis bar (and the fabulous performances of the duo Sophistication), the exemplary organisation of embarquation and disembarquation, the friendliness of the staff and other passengers.
My minor whines are as follows:
The pool areas are a bit like Butlins on a bad day, very crowded and noisy. The excursions are expensive. Charging £20 a person for a photo with the captain as the only way to see the bridge. Too many "tribute acts" in the entertainment. Very few quiet areas, as musak is everywhere (I ended up sitting out on the promenade deck)
All in all we had a fabulous time, the most relaxing holiday ever.