Actually Molokai does have a valid point on the 6 on 2 off. Couple of reasons why I took it, firstly I don't have too many years left in my usable sag. Secondly, I do, actually have my own "set-up" in China that staying there for 6 weeks in a row is not gonna be unbearable for me.
3 from my same batch of interview, did not take it up despite the latest update of pay. The 6 weeks is too long to bear, and they openly expressed displeasure at multitude of discontent during our few days of interview in China.
One thing for sure, the general employer's attitude is really "you like it, take it, unhappy, we won't care less."