I take delivery of my Model S in 28 days. For a few months I have been using Spotify for music and I subscribe to their premium service. How does Slacker compare to Spotify? Is the Slacker service available on the Tesla a premium service without restrictions and ads? If not can you upgrade the Slacker service on your Tesla to be a premium service? I guess the advantage of Slacker is that it is coming over the car's 3G connection so Tesla is paying the data fees, correct? If I want to continue to use Spotify I guess I would have to do that through my phone - what are my connection options? Is Bluetooth the way to go? Or am I better off plugging in via USB or headphone jack?