For the most part, this is an interesting and fun simulation. The frustration part comes in building your railroad system. Unlike reality, you can only have one engine on the train. The max amount of rail cars is 15 and when you select the appropriate rail cars for the loads offered, it works okay…until you go to unload the loads. The indicators for each car say they’re full, however, after you select the new loads and fill the available rail cars, and resume the simulation, you can see that the cars that were indicated to be full are now empty, thus wasting 9 or 10 car capacity for the new load. Also, If you decided to take a higher paying freight load, you get penalized money for doing that. Since you’re trying to build your pot with deliveries of passengers and freight, it’s frustrating to have your bank diminished of funds because you do what is commonly done in real life. These are things that could be an easy fix, if anyone is paying attention.