Ok, so I went ahead and installed. Heres my observations. Prior to install my Mk4 Nav was in "USA" mode, so I had the warning message on startup as well as the Emergency menu item on the main screen - I do have BMW BT/Assist.

After the install, I noticed that the NAV was now in Euro mode. Distances smaller than 1 mile were now in Yards and the Emergency menu option has disapeared from the main menu. Emergency does appear in the phone menu but doesn't do anything if you press it. You can still call BMW assist though, with the button on the Rearview mirror which I did just to make sure that that didn't get effected.

The persective view works well enough. Am I right in stating that no roadnames other than interstates/highways get displayed? I tried a 2004-2 and 2005-2 map and it seemed the same. Perspective works both in Split screen and full screen modes and I really didn't notice any slow down, even when the vehicle was turning left/right and the map needed to rotate. Since there are no road names on my map at least ... this may be a indication on how they have got pretty good performance.

Overall an interesting excercise .... :-) I hope they do release this feature in a future release, just for the cool factor!

Cheers, Adrian