Very well done. I bought the BNSF GP40...totally different sound package than this one. I think, hands down, this is one of, if not THE best sounding engines I've heard. I feel like I'm standing next to the real thing. Very, very well done.
MTH did a great job on this engine. The rear ditch lights are also cool - never seen that before on an MTH engine.
Mine also does not have marker lights. Interesting to compare the differences per road name.