Presumably the DAB on the F30 is the same as the F10.
I love it. You can actually hear stations like Talksport and 5Live(or whatever it's called) that are only otherwise available on AM and sound crap.
When I drive to Scotland, I no longer have a 20 minute radio blackout going through the hills on the way up.
Anyway, you'll see for yourself when your car comes.
August 2012 F10 520d SE sport automatic, Jet Black, Oyster\Black Leather, light ash wood trim, Professional media/ navigation, mobile apps, Internet, DAB radio.