So I am thinking about signing up for a music service and these are the two that seem to make sense. Now on one hand I was really leaning towards ZunePass because of the integration with WP7. On the other hand I was thinking about maybe Spotify because than me & my wife could use it on or respective devices, Lumia and a 4s. Anyone have experience with this dilemma? Will we both be able to use Spotify at the same time on two different devices? Is it only able to log in by using Facebook? Thanks for any help in advance.