To summarize: I would NOT go again. I did not even join the raffle to win a free cruise. There were just too many people on this ship, 99% Chinese. BUT I would still recommend this cruise, IF you are a mainland Chinese resident, used to long lines and crowds.
PROS: Embarkation was smooth, because I was put in a different queue for foreigners.
The Quantum is a very beautiful ship with an impressive modern art collection.