It seems that the mileage band is more important than the city pair - as long as you have paid for the mileage then you should be OK. Do the CSRs always (or most of the time) know what do with a ZED coupon? My first experience demonstrated that this was not the case but it was worked out in a few minutes.

I noticed in Apollo that UA has just signed their first ZED agreement with LH however AA has dozens of them in place already. It will be nice when we can flight list and check loads across the carriers. How many years into the future do you think that will be - at least with the major carriers?