We have never flown in LH first before but have two trips booked to Europe this year. What do we need to know? We will be flying SEA/FRA/ZRH and return on the first trip and SEA/FRA/SPU and SPU/MUC/ORD/SEA on the return. We are checking regularly to see if we can find a SPU/FRA/SEA flight for the return. The though of leaving LH international first for UAL domestic first is too depressing. Any other good advice or information that we might want to know?