So after a quick google it seems that the only thing is does is "automatically" calculate the price based on start and end of your trip. I put automatically in

So after a quick google it seems that the only thing is does is "automatically" calculate the price based on start and end of your trip. I put automatically in quotes because you have to stamp in/out every time you switch trains and it pre fines you for not doing it correctly the moment you use it. I think I prefer just being able to select the correct ticket ahead of time.