It’s a great OST, it is! This soundtrack is probably the best NES OST you’re ever going to find. Right in the end of its age, the NES struck in Japan with Final Fantasy III, a revolutionary game with jobs and classes…Not to mention great music.
The styles of music vary greatly, even in synth. There are jazzy songs, upbeat songs, slow songs, “new age”/modern songs, all kinds of great stuff. My favorite track is definitely track 7 (Eternal Wind), the world map music. That could quite possibly be the best world map music EVER, with Star Ocean 2’s coming in at a close second.