It provides:
- release title and artist
- release year
- tracklist with durations
It doesn't handle:
- multiple formats (digital vs CD, CD tracklist is often wrong on CD Baby, see below)
- multi discs (cdbaby doesn't either, 2xCDs with 8 and 10 tracks are listed as track 1 to 18)
- various artists releases, CD Baby doesn't provide a per-track artist credit, nor an easy way to identify various artists releases