Yep I shipped with them just before Christmas, check out their website it explains most of the stuff including pricing:
Kiwi Car Carriers
I imported a 300zx and I think that was about 10.2m^3, will be different for a skyline, someone on here should be able to let you know the size.
My car was about 650,000Yen to purchase and cost me just over $4K in customs/duty/shipping/quantine etc.
Although it only goes to Brisbane they used to do free land transport to your city (in fact your house/compliance place !) but I think that might have changed now.
The insurance says it covers anything, damage, stolen bits etc. I'm just about to test that one out as I've got damage to my bumper. I'll keep you informed on how that goes....
Other than that they were pretty good, although it did take almost a month to get down to Sydney !! but Christmas got in the way and they also had problems starting mine for the road trip so had to forklift it
Hope that helps !
Cheers,
Matt.