My Zed experience has always been great
I have used ZED in Asia several times and just went to Africa last December through Europe. It was smooth and flawless, the trip to Africa was part paper part ticket less and last week I booked a last minute zed and caught a flight on DL domestically out of Boston all very easy. I'm with American and we have the rules and requirements available on line and each airline is a bit different of course you always have to list on the flight that you want and in many cases you can do an advance check in via phone or on line. This would make an interesting thread as to good and bad experiences and also determining if it's the nonrev or airline dropping the ball?