Get it for £4.99 a month with the NUS discount, well worth it and I sync over wifi (halls internet is unreal ) and play in offline mode. Works fine with my BB
I'd recommend Spotify, I used to have a sub but have a contract with EE so get Deezer for free which is just as good.
I'm loving the discover feature they added recently - found so much new music thats of my taste but a little outside of my usual circle of artists, etc.