I've been using it for 6 months and I'm very happy with it. Before that, I had it from BMW Napster and wasn't so happy because it often didn't work. Deezer was better, but they don't offer it anymore.
I can also highly recommend Spotify.
Advantage: Listen to any music at any time. If a song is playing on the radio, you can have it recognized, and it will be displayed on Spotify.
You can select and play songs using voice control.
Disadvantage: If you want to fast-forward a song or podcast, it unfortunately doesn't work.
Otherwise, only advantages ;-
Has anyone else noticed issues with fast-forwarding songs or podcasts on Spotify in their car system? I've been using it for 6 months and love it overall—especially voice control and instant song recognition. Just wish I could skip forward in podcasts. Is this a limitation of the app or the in-car interface?
Let me know if you'd like it to sound more casual or more technical!