The absolute, unquestionable best five dollars I spend a month (on the student discount). And I'll happily up it to $10 when my student offer expires. They have an enormous library where I basically never want for artists or tracks (my music interests are not extremely niche, though). The app is great and bug-free. And I'm happy with their music-recommending algorithms (many different playlists appear at the main screen which are populated on daily or weekly for you to listen to based on your interests). Only feature I want for is a built-in song lyric display, which I see Apple Music has, for when I want to belt loudly along.
This is a major selling point, so thanks for mentioning it. I've been using Plex which has some features I like, but it also goes through broken-slightly broken-fixed-broken cycles on the app.The app is great and bug-free.