These are, quite simply, the best running and most detailed N-scale locomotives I've ever owned. I have the GTEL Turbine and now I have two of the ET44AC's that arrived Monday. Plan on (maybe) putting up a video. BTW, the NS model actually has ditch lights that flash alternately just like the prototype when you sound the horn. First time in a production N-scale loco unless I'm mistaken. All models have ditch lights that operate separately from the headlights, dimmable headlights etc. Massive amount of detail not only on the body but the trucks and frame as well. Worth every penny, even if I did weep a bit as I completed my order.