Pros: Arrived to the airport early the check in agents was able to change our seats.
Cons: We bought our tickets 7 months ahead but was not able to select our seats. I was not able to pick seats 48hrs before the departure as stated on the Asiana websites, nor 24hrs prior. Early online check in did not allow us to select seats either, instead we were assigned the worst seats possible on the last row. I have a 10 year old who get sick during flight. I find that it is ridiculous that all seats were blocked as "full" when we bought the tickets so much in advance.