I have an ATSF A/B Set. Only the A unit is powered though. That sucker is very heavy. It pulls the B unit and about 25 cars on its own. As far as looks, I must say it is wonderful. The paint is crisp and very well done. The DCC conversion is somewhat difficult because part of the rear weight has to be trimmed to make space for a small decoder. The motor is already isolated, so it is unintentionally DCC ready...kinda. Ive never had any trouble with it. It has great electrical pickup. From what I hear, it is not difficult to power up the B unit. Hope that helps