"An annual academic study of the quality of the air travel experience found that it reached its lowest level ever this year (see this week’s story). It rated AirTran as the best in its index of quality measurements, US Airways as the worst among the major carriers, and Atlantic Southeast as the worst of the 16 airlines studied. What’s your opinion? Which airline do you think provides travelers with the best experience, and which ranks at the bottom? Post your comments here."