I have nothing but good things to say about the nav system in my 2016 CX5. It's reliable, fast, reasonably accurate. I say reasonably accurate due to the fact Google Maps is able to fully account for bad traffic and sometimes provides a faster route. I started out using Google Nav on my phone when I first got the vehicle, but I've since switched to using the on-board nav system almost exclusively (I've had the vehicle for ~6mo now).The menus for choosing the destinationare also really nicely implemented. I'm pleased withthe nav system. I'm not a fan of the voice they've installed with the nav, so I usually turn the nav volume all the way down.