On my 2013 I have a love hate relationship with the nav system but I have found the maps to be as good as my Garmin GPS. It may be in our area the maping may not be right, I think they all use the same base maps, even when I was using my Garmin I found area's that were wrong.
What I don't like is using the voice comands when using it , in the TV adds they make it look so easy but in real life well lets say I say a few things to it that I know it doesn't understand.

Denny