The description says that the soundtrack includes "every song in the game at 320kbps CD quality."
These are all the songs that do not meet the advertised quality of "320kbps"
Target World (Shang Mu Academy) -----128kbps
Up the Creek (Jade Creek 1) -----256kbps
Up the Sub (Jade Creek 2) -----256kbps
Pangu Lagoon 1 (English) -----128kbps
Pangu Lagoon 1 (Japanese) -----128kbps
Time Attack -----128kbps
Relic Maze (Extended Mix) -----256kbps
Freedom Planet Theme (Orchestral Remix) -----128kbps
Beta Dragon Valley 1 -----128kbps
Beta Minor Boss Battle -----128kbps
Beta Speed Powerup -----128kbps
Beta Title -----128kbps
Until these are fixed, I cannot recommend this soundtrack due to false advertising. If you are okay with lower bitrates on some songs, then go right ahead and buy it. You probably won't notice the difference anyway (depending on your audio equipment). One other note is that the invincibility song, known as "I am Invincible" is also included (track 72) as well as a commentary (MS word document) on each of the songs by the artist, Woofle.