Oh, I noticed one weird bug already (I'm sure I'll discover more). Playing from the USB port, I did a search for a specific artist. It found 10 songs (the USB drive had about 5,000 MP3s across dozens of folders). When I played those ten songs, it displayed album art from other artists.
Example: "I've Seen All Good People" by YES, but the artwork was from a Frank Sinatra CD.
It was my first time playing around with this (only had the car about a week), and I was driving, so I didn't have a chance to explore. I'll have to see if there is any rhyme or reason to it. Perhaps it grabbed the art that went with the 1st track of that folder, even if the song being played was track 50. Or whatever.
But definitely a bug.
2013 550i Space Gray, M-Sport--del Dec 2013
2013 X5 5.0 Orion Silver--del Dec 2013
2009 X5 4.8 White (w/hitch)
2007 550i Monaco Blue, Sport
2004 X5 4.4i
2003 540i M-Sport w/Dinan mods (last of the great E39's)
2002 X5 3.0
2000 540i Sport
1995 525i Sport