Spotify worked well once I logged in. Apparently there is no good way for apps to report errors like that to the user, so you just get no content.
Music was fine. Maps was a little twitchy, but it did notice that I was very likely heading to work and offer up a route. I wonder if it will integrate with the calendar in the same way.
Podcasts though, egad. Apple, you need to actually let the dev that owns this app fix some bugs. I had to force quit the app just to get it to play anything. I'll be happy when someone like Instacast is allowed to integrate.