The "DLC soundtrack" works in-game, but it doesn't appear in the Steam-user-account's list of soundtracks - which means that the music can't be listened to outside of game (through Steam's music player). Something many may not mind at all. I find it to be quite lame tho, especially because the DLC-soundtracks of with C:S associated CKII and EUIV do appear in that list, and it seems inconsistent for the C:S DLC soundtracks not to.

Always good to have some mix in the music in the game, especially country music for your farming cities!

I think it's the best music supplement to Cities Skylines so far. I'll use it from the disk, even if I do not play CS.