Ordered my E90 w/ navi and no regrets!
VERY nice option. Saved me a few times (esp during my ED Trip).
Some say it will make the car look more dated in a few yrs but i dont care.
2015 M5 Imperial Blue
/ Individual Amaro Brown
/ Individual Piano Black Trim
/ Executive Package/ 20" 343 Wheels --> 12/1/14 ED Pickup