Bearing in mind that we didn't expect similar cruising to European river cruising we were disappointed at first but mainly didn't like the colours of the inside nor the long long rows of corridors.
The food was average but the service good in the restaurants we attended (all included) but that was offset by the casual atmosphere with only shorts and thongs not allowed in the main restaurant, although the girls were allowed in with skimpy shorts.
The most dressed up we got was trousers and short sleeved cotton shirt and not out of place.
Plenty to do and lots of entertainment of various types but nothing startling and the internal TV programming was just awful except for kids.
We had a very entertaining cruise director, very gay but in a fun way and the Captain spent more time mingling with the passengers than anything else and happily posed for pictures.
Cruising is cheap these days but I suspect that is because the passengers represent a captive marketing opportunity with most spending more on board than they spent for the actual cruise fee.
Our balcony wasn't fully utilised because of passengers in other units smoking outside, very annoying and P and O need to enforce their no smoking rules more rigidly.