So a bad review just because you do not know what is an add-on, I find it a bit exaggerated. The add-on comes with 9 standard tasks and none of the career mode. The game runs just as smooth as the other routes also with me. Only from time to time a short back, but I can live with. The track is just over 30 km long, very detailed and consists of many tracks. The shunting on the sidings are enormous by quite a bit of a challenge. What still annoying, is that one does have light on in the dark, but you can not see than without. The fact that the track is not so long, making mainly the S-Bahn and tasks of shunting most Spaß.Man can but also move freely without duties on the complete track system.