That is one of the nicest train sets that any manufacturer has done. I anticipate the Norfolk Southern Safety Train to be just as nice.
For the record, if you want to add an Atlas 89' flat car to your train you will need a minimum 72" diameter curve. Even with O-72's there are some restrictions like coupling a car with an extended-length coupler in front of and behind the flat car. Cars with standard length couplers will derail on O-72's when coupled to an 89' flat car.
