I have no complaints with my nav as far as doing what it was designed to do. The one aspect I don't much care for which is not Volt specific is the inability to put in an address when the car is in motion using the screen. I completely understand this is a safety feature, but having that ability with a passenger present would be ideal. Even using the passenger airbag sensor to unlock the system for input while in operation (it detects a passenger which allows the system to unlock to put in the destination). I do also like the ability to send a destination to the unit through the onstar app. I do however wish it integrated google maps to also allow you to send destination from your mobile device since any web search generally defaults to the google map if using android.