French is terrible in one direction: pronunciation to spelling is a nightmare, as most sounds can be written in a least 3 ways. «un» «um», «in», «im», «ain», «aim» and «ein» are pronounced the same, so if you hear this sound, good luck figuring out how to spell it.

But the other way around isn't really bad: a spelling almost always have an unambiguous pronunciation. (There are exceptions but they are few and far between)

At least if you don't count ancient French, which is still prominent in places name's, and have a totally arbitrary pronunciation. As a little game for French speakers, try pronouncing the name of the city of «Meung sur Loire» ;).