I agree with both GN and rat, each to an extent. The only problem with what GN says regarding the EK contract as it exists, is that it changes frequently, and we as employees have no input to the changes. Consequently, the majority (not all) of changes to my contract since I have been here have been for the worse; and unfortunately, the changes are presented as fait accompli, as you have no process of appeal.
Think long and hard about what you have, what you will be leaving, and how long you can tolerate living on the other side of the world, especially coming from one of the world's most liveable cities, to one of the world's less liveable cities. And if you have a wife and kids, be ever so careful.