Queen Mary 2 is fantastic if you like container terminals.
The Queen Mary 2 is a fantastic liner but as a cruise ship she falls down on her accessibility to cruise terminals due to her physical size.
The result of this is that tours have very long coach journeys typically 4 hours or more for the return journey. Additionally the inability of the the ship to dock at Hong Kong cruise terminal meant that all disembarking passengers and their baggage were shipped separately out to the expo centre near the airport (a 40 minute ride) and dumped there by Cunard to find their own way back to town. We were only informed of this change at the last minute so pre-booked taxis were unable to be informed of the change. To add insult to injury we had purposely chosen a hotel adjacent to the cruise terminal and instead of it taking just minutes to get checked in to our hotel we were still messing about at our own expense after 2 1/2 hours. Zero out 10 for Cunard.
Have you noticed that on all the questionnaires they ask about the quality of the registration process but they never get feedback on the disembarkation process.
The other point about Cunard is that they do not inform the passengers of difficult or sensitive changes to the itinerary.
We were on a long 38 night trip but we booked an itinerary which included a call at Koh Samui, Thailand. This was dropped from the schedule without us ever being informed.
Lastly be aware that if you join a multi sector world cruise for more than one sector , the entertainment package has a considerable amount of repetition. We covered 3 sectors and by the end we were becoming very disappointed.
Having said all this we enjoyed our cruise very much. The ship is beautiful. The food is great. The staff are very attentive.