Being from Milwaukee I wind up flying Northwest a lot. But I don't have a lot to say about them. They're a pretty standard US airline, much like Delta. Nothing particularly horrible about them, but nothing to write home about.

However, my one and only business class experience was on Northwest (SFO-NRT) and I must say it was phenomenal. Nonstop food, reading material, a little TV set, booze at the snap of your fingers... but then again I have nothing to compare it to.

Drawbacks:

Old planes. Northwest flies DC-9s that are getting close to 35 years old. Imagine driving a car that old. Granted with proper maintenance those planes are probably fine, but they feel old. They look old. Stuff shakes around in them, and they smell of years of cigarettes that will never go away.

[official site]