Anyone know any direct transportation from HK Island to SZ Airport and how much?

There are many private companies offer door-to-door service with private car (e.g. Japanese 7-seater car)

But it's quite expensive, at least HKD1,000 one way.

Really sorry that I have forgotten the contact # for the companies... but I think you can google it and easily find many.

I just have experience landing in SZ but not departing.  It's straightforward and no problem at all.