We are also just back from the same cruise. It was our second cruise on Britannia, we also sailed on her last summer. We had a great time and came home totally pleased with the experience. There were positives and negatives but nothing that would prevent me from booking another cruise with P&O or on Britannia.
Positives
A smooth and hassle free embarkation, we were on within 10 minutes.
The itinerary - anyone who has not visited the Baltic's should definitely go. The area is beautiful and easily explored on your own.
Cabin- we picked an obstructed cabin on G deck beside the aft stairs and elevators. It was quiet and convenient for dining,shows etc
Entertainment- we enjoyed the dance classes, the quizzes, shows and talks
Staff- by and large we found the staff helpful and pleasant. Some went out of their way more than others but I cannot complain about them at all
Passengers- I have see a lot of complaints about passenger behaviour but I met some lovely people from around the country and saw very little in the way of bad behaviour.
The epicurean afternoon tea.- A wonderful treat for a Sunday afternoon
Negatives
The only real negative I have is regarding the MDR. There were a lot of sharing tables set up, with not a great number of tables for two. As a result it was impossible to walk in and get a table as we did last year unless you were prepared to share. It meant I needed to use the app. This does away with the whole freedom aspect.
The MDR menu was also a bit of a let down. On paper it looked good , but in reality the food was bland and under seasoned. Oven roasted vegetables were usually just boiled and I never want to see another
string bean again. I actually preferred the Horizon food.
Of course these are my own opinions and I understand others will see things differently. I'm happy to hear others opinions.