Nokia Music, free radio or like Spotify?

[MojoDoj0]

Im getting my Lumia 920 this thursday.
Im new to WP and never had a Nokia before.
Im curious about the Nokia Music. The only thing that I can find that's free about Nokia Music is the mixed radio.
Is the app like Spotify, I pay every month and can decide which music I want to listen to, but for free?
Can I just search for John Lennon and listen to all his songs for free?
Or is it like a free radio with the option to buy the songs I want to listen to?

 

[kebnt]

It is more like free radio with the option to buy the songs. The plus side is that you can download the mixes or playlists and listen to them offline, but as far as I've found, you can't select songs to make a playlist like Spotify and then also have them available offline.