This may be covered somewhere already. If so, please point me to the correct thread. I have an '08 335xi with iDrive. I was thinking about upgrading the headunit to an Android unit. I have watched youtube videos about the upgrade. It appears the upgrade maintains the original iDrive functions/screens and simply adds a new option to scroll over to the Android functions. Has anybody here done this modification and how happy are you with it? Any glitches/issues? Thanks.