This week I purchased the 5 car set of these cars from Mr Muffin. Now back home I open the set to check them out. Good news is they are nicely done with correct trucks and many figures filling the seats and aisles. The not so good news is while the MTH catalog indicates the numbers on the coaches would be 2650, 2657, and 2665, correct for the cars that ACF built (2645-2669). Instead, they used 2600, 2610, and 2635. The number range 2600-2644 is what were used on the cars built by Pullman. I am not aware that MTH ever made Pullman streamline cars and these definitely are not, rather the same ACF cars they have always made. Too bad as they had a chance to be very close to being protoypically correct.
I can't really comment on window arrangment as the only picture I have of these cars is one of a Pullman car (2640). The windows are close but not identical but without seeing an ACF car I have no idea if they differed.
Somewhere between the initial research done on these cars and the finished product there was a another failure to communicate.
One last detail MTH should consider doing is using full width diaphragms where called for like Lionel and 3rd Rail do. These cars should have full width diaphragms but, not surprisingly, do not.
Pete