AJX has a ZED agreement with quite a number of airlines, so I think the options are there for a decent number of routes. For you, travelling to SYD, both QF and JQ are available. I'm not an expert on ZED travel, preferring to take the C class option, but there are quite a few guys that do use the facility and they seem to be pretty successful. As with all staff travel, you pick your fights but you can use ZED or C class whenever you want, so ZEDing during the off-peak times and using C class during peak times could be considered a sensible way of arranging your travel. It is nice to have that option
