No random variation is possible. The programme may tell you the train is on the slow line but the video clip shows the train on the fast line. Time of day or weather effects are not possible with this type of view. The quality of the video clip also leaves a little to be desired. There is some sound support, slightly improved in the updated version of the software but nothing to test your speakers.
Physics are average - train performance seems to have been simplified.
The programme is not cheap either - at 44.99 per route. I repeat - per route. To buy additional routes in the series you have to pay the full 44.99 again. I try to avoid undue criticism on these pages but this is a crazy policy and is unlikely to survive the arrival of programmes like Microsoft Train Simulator and Trainz. This is another German programming effort by a company called Bitsoft.