I am fan of city transit routes/scenerios. I have found that several streetcars and the SF Cable cars will not work on the TrainZ 2012. That has kept me from using this version and remain with the TrainZ10 version as my primary version. Even some unit made for version prior to TrainZ10 will not work on that verson also. This is very disconcerting to me. I had hoped that the new versions of TrainZ with their fixes would accept older unit but this does not seem to be the case with a lot of rolling stock, track, and catenary wiring / tracks.