Too tall. They have about 6" too much height (IIRC the doors touch the raised walkway, where they should not quite reach it). I could be wrong on which doors were wrong though. I know though, as I've been told, that of the GP38-2's on the market, the Athearn is the most prototypically (is that even a word?) accurate, after what is it now, 30 years?
The P2K was fudged in many ways too.
Come to think of it, there was a gap in unit offerings from Atlas, wonder if they screwed up the GP38-2 and said, "heck, lets just create a cheaper line of trains", though it seems as if it should have been a Master series loco (see GP38/40 skip ahead to GP40-2...?).