I went on this trip last September - my first with Just You - and it was absolutely brilliant. Very full on and busy but it needed to be as there was so much to fit in. The hotels were excellent. There are a few reviews on the actual trip so will answer the particular questions asked.
With regard to how much money to take it's more a question of how long is a piece of string! At one end of the scale you don't need to take a lot as all meals and a drink at each one and 90% of the excursions are already paid for but on the other end if you want to take home lots of souvenirs you might need lots more. I took £300 and brought some back and certainly didn't skimp on anything.
With regard to Air China I too was apprehensive as had heard bad reports but the opposite was true, they were very good. Maybe we were lucky as we had a new plane going out and coming back but everything was absolutely fine; the food was good (providing you are not fussy) with a choice of English or Chinese, the staff were very pleasant, the entertainment was fairly limited but there were English films to hand. The loos were modern and clean.
You will have a great time and as soon as you get home you'll be looking in the brochure to see where to go to next. In my case South Africa. Then Canada, then .... who knows, Just You will probably be bringing out something new to tempt me!
