It's a brilliant bit of kit, but if you have the full package (i.e. with 6FL USB in the armrest) then controlling USB devices is sometimes more convinient than the built-in HDD. I still put all the music on the HDD though so I'm not reliant on the i-Pod.
Current: 2014 F31 320d M-Sport, Professional Media, Visibility Pack, Reversing Camera, DAB
Previous: 2013 F10 520d M-Sport, 2011 F10 520d M-Sport, 2008 320i M-Sport Coupe, 2002 325i, 2001 318i valvetronic, 1998 318i, 1996 525i, 1990 Porsche 944S2