I'm a United defector to NW. I've had uniformly good to excellent experiences with NW this year.

I did have to have Gold Elite re-enter my Worldperks number to get the upgrades since I'd booked prior to the comp status. But I've had about the 75% experience related above.

I've also experienced wx delays. But what I notice about NW is that I've had much, much more frequent and detailed information from GA's. Overall, there is no comparison between employee attitudes on the two carriers.

Your experience, horrid as it obviously was, could have been an anomaly. Probably similar to the SFH that marked the slide to abysmal for UA performance.