I visited NW corporate HQ on business and it was the rudest, nastiest experience I have had in many years of business.

I would never fly NW given a choice and I think that this sort of attitude permeats from the top down. In fact, I am sure of it. But if you continue to fly NW you shouldn't be upset about the results.

That said, many NW people I am sure are nice people and many FTers will have good experiences on NW. But I do not plan to be one of them.

These complaints take a toll on you. They are very unhealthful. I wouldn't bother, personally. I'd take my biz to another airline and save myself the bother and the upset.