I am flying on NW in October from DFW to DTW, and then on to either FRA or AMS. If it's FRA, I'm on a DC-10, and if it's AMS I'm on a 747-400. Anybody have any good/bad things to say about NW's longhaul Y Class? This is my first time flying with them, and I'm a bit apprehensive. Anything you have to contribute, good or bad, would be much appreciated. Many thanks!