For me, there's two separate problems with some Southern TVMs:
First, some of them have have slow and glitchy interfaces, where keypresses take ages to show on screen even after you see the button you press light up, and the list of stations that matches the currently entered prefix updates.
Second, those machines that are exposed to the elements due to their location outdoors seem to have impossible touchscreens to use. You have to press some of them so hard you think you're going to smash the glass before they will register a press.