Cheap to buy, mass made, reliable, cheap to run. In their respective markets they are suitable choices, no?
Not to mention decent to drive, fairly well put together and are becoming increasedly stylish.
For someone wanting a value for money A-B motor, that's reliable, cheap to fix, good looking, comfortable, fun to drive and modern, one of the main Ford range (Fiesta, Focus, Mondeo) is bound to fit their needs.