MTC have come a long way very quickly from their first offering of a toyish SS3 to a very high quality modelling company. The BJ class has a plastic body with VERY sharp details as well as many separately applied brass parts. Most of these parts are extremely fine and have an excellent compromise between Bachmann's durability and Haidar's delicacy. If anything, I find the front handrails slighty chunky and perhaps the 'Beijing' emblem on the front a bit on the thick side, and being in an area of the locomotive that isn't handled much and most viewed, I feel these could have been done better. Worth noting (the good stuff) are the horn detail, windshield wipers, footsteps, undercarriage details and number boards. While the bogie side frames could probably have been a little sharper, the depth is nice and they've gone to a lot of trouble to apply some wire components underneath which seem to like to fall out whenever they feel like. It is a nice touch, but unless you run your locomotives upside down you probably won't even notice them if they do go astray. There does unfortunately appear to be some quality control issues - asides from the aforementioned, a bent up footstep and a nasty paint scratch over one of the depot code markings.. quite annoying to say the least! Some tiny sand pipes are included to attach to the bogies for those mad enough to attempt it. The doors can be opened by pushing on them, although they are spring loaded with quite a lot of resistance. I'm unsure if they click open and I'm not really game enough to test their limits!