[khr]

I have found it to be a useful feature that is worth the 1% daily battery life. I prefer it to Shazam/Soundhound because it's passive. I don't have to unlock my phone, open an app, press a button, and wait for the app to recognize the music. That whole process is disruptive to conversation if I'm with someone. How often the question of "what song is this" comes up depends on who you are, and it has occurred to me often enough such that I've recognized that I much prefer using Now Playing.

I agree that the database is a major limitation, although for me it acts as a first pass to see if the song I'm listening to is popular enough to be recognized.