I downloaded the update to a USB drive on my laptop and then followed the installation instructions. Pretty easy and the map update was definitely needed. I think I am one of the few people who actually use the factory nav. I find it works very well 98% of the time and those times when it does not work, I am pretty sure Waze and other apps would have has the same issues.
My experience is my whenever I have a major issue, it was user error. I want to enter "700 South M Street" and the Nav unit wants me to enter "700 M street South". I find the same issue with my Gamin unit, Waze, Apple Maps and Google maps.