This is CMR's first freight car, which has been brilliantly executed. They are sold in four-packs (the cars of the second production are sold individually), each pack with a different bureau - Wuhan, Urumuqi, Jinzhou & Hangzhou (although there is nothing to tell which beareau they belong to apart from on the packaging or the cars themselves). Much of the information is taken from the P62NK box car review as they are identical apart from some slight external differences.
The packaging is one of the only flaws with them and hopefully this will be revised on future models. They come in individual two piece plastic clam shells. The cardboard outer box is very thin cardboard. It works well enough, but I can imagine these could be very easily damaged in the mail or in long term storage. I was sort of dismayed when I saw the state of mine from a Hong Kong vendor! It's especially disappointing after being accustomed to the superb boxes of CMR's SS3 electric locomotives. If using the original boxes for storage, make sure the brake wheels are to the right of the box or you will damage some of the undercarriage.
Details are really very good - unfortunately the good bits are underneath the car! Nevertheless they feature etched metal walkways, vertical brake wheels, air hoses and ultra fine uncoupling rods. On the downside, they do have pretty chunky ladders, which don't stand out too much due to the color and the doors don't open.
The cars I have run very freely and are relatively heavy for freight cars which should keep inertia helping the train along - although I'm not sure if that will effect long trains or gradients.
Plastic knuckle couplers - while these ones seem to work quite well, however as a genereal rule I simply don't trust anything apart from KD couplers. They will be very shortly converted to KD's - use medium shank whisker couplers with scale heads (158).
Overall, these are superb freight cars at bargain basement prices! These retail for less than $90USD (Dec 2012) for a 4 pack! There are a few minor caveats, however most of these can be rectified or simply ignored. They look great mixed in with Bachmann's P64's.