You are absolutely right, the amount of engineering that went into making them is impressive. Regarding the UI - despite not looking "high-tech" (no animations

You are absolutely right, the amount of engineering that went into making them is impressive. Regarding the UI - despite not looking "high-tech" (no animations at all -not even transitions- simple basic color scheme), I find it very good: I live in a remote village, and grandmas here have no problems using the ticket machine, even for unusual trips. Of course they usually pay with coins, and that part takes ages ;)