Never had an issue, but if you only list for Coach, then you are screwed if only First Class is only thing open, listing for a First will give you a seat anywhere on plane if open. Doesn't cost anymore. Also, we fly for free in either class, only thing you pay is taxes for international, so it doesn't matter what you lost as. Not sure how the guest passes work, if my friends can't afford the plane ticket, they prob don't need to go on the trip to begin with, ha.