Wirelessly posted (BlackBerry8700/4.2.1 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/114)

Well, that bad? Certainly not the most confusing airport in the world, there are other examples. In general, there is for Star Alliance ONE Terminal with three piers. I agree, it becomes confusing but not because of the airport, but because of "Schengen, Non-Schengen, EU, Non-EU, US" and all possible combination of transfers between these five alternatives.All of this has an effect on the airport layout. If you are not familiar with FRA and the concept and have to change between the piers, going landside from one pier and going airside again from the other can be the easiest.