Not very. For some reason, although Walthers says that it employs corrugated sides where appropriate, the D&RGW releases consistently appear without corrugation: The prototype is documented on drgw.org: A photo of the prototype from Division Point's Web site: This wouldn't be a bad model if had corrugation... the trucks look right, the roof details are close enough, the doors... well, tomorrow morning I wouldn't remember whether the prototype was supposed to have 3 windows per door, 4 windows per door, or 3 windows on one door and 4 on the other, and frankly, I don't care. BUT the lack of corrugation keeps me from ordering these - darn. -B.