Yes, I have flown China Eastern - about 18 months ago internally in China. The crew were delightful. I flew business on my out trip and the service was comparable to US Domestic First. On my return, I flew economy due to a travel agent mistake. Again, the crew were fine, the passengers..well, they ranged from the woman next to me who spoke English and decided to tell me what a s**t her husband was, didn't love her, wasn't intelligent enough, their marriage was over etc. The husband in question was in the window seat...
Other passengers were hawking, snorting, shouting and so on - much like in hotels and restaurants.
At least you're going in the right direction. Singapore is just perfection.
Enjoy.