When you press play on a station, song, album, artist, etc... in SN, you should be greeted with the same display feedback as when you play or add tracks with SlimServer, i.e.  show briefly "Now Playing" or "Adding To Playlist" on the top line.   

If it takes additional time to start hearing music when pressing play, additionally we should show buffering/song info capturing feedback on the display to explain to the user what they are waiting for.  

If music is playing and the user isn't waiting (even though the server may be fetching data) we shouldn't bother the user with updated status on the display (for example, when fetching metadata about the next track when a song is currently playing).