Brilliantly Bravely
I've always thoroughly enjoyed the music of Square Enix, but this soundtrack was composed and produced by ryo(supercell). I decided to purchase and listen to his work and it's quite beautiful and perfectly match the ambience and spirit of the game it was created for.
This isn't the first time SE has contracted an external musician to produce music for their games. Yasunori Mitsuda has produced an amazing library for them and so has Hitoshi Sakimoto and Masaharu Iwata. But I believe this might be the first time a J-Pop artist has composed an entire soundtrack for them.
There are some quirks and flaws with a few tracks, but that's essentially my personal feelings and does not detract the overall quality of the over 45 tracks featured on these 3 discs.