The lack of a good navigation setup and the price I avoid navigation units. I rather spend half of that and get a avh series that has Bluetooth and all the other bells and whistles and get one equipped with mirror link or app radio and use Waze for the navigation. No point in having a dedicated navi unit when your not driving around enough to use it and justify the cost and last time I checked the avh had more features then the navi ones especially when it comes to audio settings.