Good Things About Asiana Airlines
One-Way Awards- Asiana offers one-way awards for 50% of the cost of a roundtrip. Many award programs require round-trip awards.
First Class Awards- First Class awards are priced very competitively. For example, you could fly Los Angeles to Frankfurt in Lufthansa first class for only 50,000 points.
Round the World- You can do an around the world trip with up to seven stopovers for 140,000 in Economy or 230,000 points for Business Class. However, ANA's round the world chart is better for flights under 39,000 miles flown for business class and under 34,000 for economy class.
Elite Status- Asiana has elite "membership terms" of 24 months instead of measuring elite status by the calendar year. Therefore, if you fly 40,000 miles with Asiana and Star Alliance partners, you can get valuable Star Alliance Gold Status for the rest of your membership term and the following membership term (at least 24 months).
Etihad Awards- Etihad Airlines is a partner with Asiana and you can get really good values flying to Southeast Asia from the east coast of the U.S. in business or first class.
Bad Things About Asiana Airlines
Fuel Surcharges- Asiana has reasonable surcharges on their own flights to Seoul (under $100), but they pass on surcharges for all Star Alliance partners, which can become costly.
Only One Transfer Partner- Marriott is the only main transfer partner of Asiana.
Maximum Mileage Permitted Rules- Asiana has a fairly restrictive Maximum Permitted Mileage ("MPM") rule for Star Alliance and Etihad. MPM is the maximum distance allowed between the departure city and destinationThis means that you can't fly from Los Angeles to Tokyo via the Middle East. American Airlines has a similar rule but allows you to go over 25% of the MPM on awards.
U.S. Routes to Seoul: Chicago, Honolulu, Los Angeles, New York, San Francisco, and Seattle.
Seat Maps by Plane: SeatGuru
A380 Routes: Los Angeles, Frankfurt, and New York
Points Expiration: 10 years from earn date.
More Information: Asiana's Wikipedia (There was a crash at San Francisco's airport in 2013 that killed 3 people).