My wife and I have just returned from a cruise to La Rochelle, Bilbao, La Coruna and Guernsey aboard Britannia. We thought that after some six months of service, any " teething troubles" would have been resolved. We thought right ! Most aspects of our cruise were excellent. Lifts which have been a source of problems in the past did not affect us at all. The service, food and entertainment were as excellent as ever on P & O. Even the weather smiled on us throughout the trip. Well done to all concerned.
One tip I would suggest is that in order to maximise ease of movement around the ship, try to get a cabin, with or without a balcony on Level 9 (F Deck)