I picked up one of the Broadway Limited Frisco SW7s in black and yellow; #301 with Paragon 2 sound. The model is nicely made and detailed and runs smoothly (although it was pre-programmed to address 303), and since I am not a Frisco SW7 expert I can't comment on accuracy of the model, but I will comment on the sound decoder. The Paragon 2 decoder is yet another incarnation of a typical QSI decoder. As a typical QSI decoder, it is good at making noise. Note that I said noise. I searched Youtube and listened to all of the prototype SW7s that I could find and could not find a match to the UFO-like whirring sound that I hear from this decoder. I hear no exhaust pulse when the throttle is notched up, instead all I hear is an increase in the frequency of the annoying whirring sound; nothing that sounds like an EMD 567 working to move a load. The decoder does have additional interesting sounds pre-programmed to function keys, including City sounds, Livestock sounds, Maintenance Facility sounds, Passenger sounds, Freight sounds, Crew Radio Messages, Radio Chatter in City, Radio Chatter in Rural Settings, Industrial sounds, Lumber Mill sounds, and a few more. It's a shame they dedicate so much effort to adding all those other sounds instead of getting a really good recording of something that sounds like what they supposedly are reproducing. I won't repeat my disgust with programming QSI decoders. Bottom line; the guts are coming out of this nice model and it is going to get Soundtraxx quality sound; either a Tsunami or one of the new Econami Diesel decoders and one of my Sweet Sound speakers. I am also going to re-work the headlights so the LEDS are pointed out the lens instead of perpendicular to the lens as the were built.