What are your thoughts on mobile game soundtracks?

[Vert1]

Are you impressed? Any thoughts on how mobile music compares to game handheld music? I have listened to a couple of soundtracks from mobile games, and my opinion is as follows:
Fire Emblem Heroes has the best soundtrack I've heard for a mobile game - FEH Music
Girls' Frontline has good selection of space age tunes but no particularly strong tracks - Girls Frontline OST
Kancolle music is iffy. Arranged tracks are decent - (1) and (2)
Super Mario Run has music that I can't remember outside of the medley, which is decent, although I was more impressed by how this type of track got incorporated into a game. Edit: Listened to it again today, and I think the music is of good quality. Of interest is how I've read game reviewers complaining about the music in the New Super Mario Bros series while this mobile game hasn't gotten any complaints.