My 25 y.o. Daughter just returned from a 2-1/2 month trip to Russia, South Korea, Japan and China, which included a 5 night trip on Quantum out of Shanghai. She had a great time.
As as far as food goes, she said Windjammer had some great exotic fruits, Chinese noodle dishes and typical fare like burgers and hot dogs. She never had trouble finding something good to eat.
She also ate at the Hot Pot specialty restaurant and highly recommends it. Jamie’s is just like it is on other ships. The appetizers in the concierge lounge were also like the other ships.
The crew were fantastic. She could not go 10 feet without a crew member calling out her name and stopping to chat.
The concierge told her there were only 40 people on the ship from non-Asian countries and only 10 of those were native English speakers. Even so, all major announcements were also made in English. There were over 1k people on board from a single Chinese company.
We sailed on Quantum out of Singapore several years ago. I would not hesitate to sail on her again. I expect there will be many more English speakers on your sailing than on the one my daughter was on.
Some people have reported shoving and pushing ahead of others. My daughter said queues were non-existent in Windjammer but she is pretty laid back and had no problems. In fact, she said it was MUCH worse at Shanghai Disney.
if you have any specific questions, I am happy to pass them on to my daughter.