You pay 9.99 per month or get a family pack of up to six people and pay 16.99 per month. You can download basically any song you can think of and play it offline. You have radio like pandora and then also playlists like spotify. Also if you like rap/hip hop you can find the clean versions to any song. That is hard to do on Spotify. (Yes I realize that only mormons would be excited about being able to find clean music) I'm quite impressed with it.

Oh and the first three months are free. I intend on using those three months to download all sorts of music and then not paying after that