The simulator is available with 3 variations of MAN double-decker busses from the 1980s and the only real map the game comes with is also set in 1980s Berlin. It also supports Track-IR technology(tracking your head to move the in-game camera) and almost all racing wheels available on the market if you don't get used to the mouse controls. Graphically speaking it's decent but it lacks the eye candy of 'commercial' games - another plus in my book, as it enables the game to run on surprisingly old machines.
The more frequently used functions can be mapped to the keyboard for a more enjoyable experience. Using the mouse is also recommended for steering the 12-meter giants through often impossibly narrow streets with cars parked on both sides.
Simulator aficionados will love its interface, in that there isn’t one - all the buttons and switches are on the dashboard of the bus and are operated via the mouse.