優點： Yes, we were unexpected and surprised being upgrade to premier class
缺點： no complaints. very appreciated our upgrade, since we went to Prague for mother-in-law's funeral, we were absolutely exhausted.This up grade made an excellence different to us. Thanks very much.
優點： for the flight from Seoul to Singapore, the flight was superb. In-flight services was perfect. food was excellent and the air stewards and stewardess were all very helpful and full of smiles.
缺點： Check In process at Seoul Counter. the check-in was stressful. the ground staffs insist on using Check-in Kiosks provided even when it was not working as it should be. Ended up being bounced from one staff to another.