We lived in Japan for three years and I have had the best of NWA and the WORST of NWA! (The cabin service is okay, food is adequate, the flight attendants I met were very rude on the whole. I remember on flight from Tokyo to JFK, I was traveling with my six month old son, he began to cry, so I got up and was walking him around. I struck up a conversation with another mom in the aisle (we were out of the way of people) when a flight attendant came out of the "crew sleep room" in the back of coach and said "Can you please stop talking, we have crew who are trying to sleep here, jeeeez!" I was speechless (which I quess was what he wanted) but we were not talking loudly at all and it was not in a dark cabin, it was right around the dinner service.
The final straw was when I flew with my son from NY to LA. I had upgraded to first class (two seats and a lot of frequent flyer miles) and we were supposed to stop in Detroit but not get off the plane. When we landed in Detroit they announced that the next leg of the flight to LA was cancelled. When I made my way out to the "agent" she said I could get on a flight to Memphis, then to LA, with two seats in row 42. I told her that I was flying first class and she said "You didn't pay for those seats and that is the only thing I can offer you" I asked her if she could put me on another airline and she said "If I did that I would be spending more money on your two tickets than you spent on your little vacation, wouldnt I!" She then shoved two tickets at me and said "Okay, these are your FIRST CLASS tickets". I had to run to another terminal and when I got to the gate (holding my infant son and a car seat} the flight attendant said hello, you are in row 42! She gave me the two original tickets anyway. I was so tired that I just dropped the carseat and started to cry. A very nice supervisor came over, heard my story, gave me a generous meal voucher and put me on a plane that night. I had to rent a room for the six hours we waited, but it was the best thing because I was so upset. The supervisor told me that they had many complaints about that rude employee and urged me to call a special number. I did so when I got to LA and they were very apologetic. He said he wanted to upgrade me to Tokyo the next day but the flight was sold out. About two months later I got a free roundtrip international upgrade to first class from NW.,... with no travel restrictions. My mom used it when she came to see us, so I think I personally experienced some of the worst NWA had to offer and some of the best, as well.