You can use split screen if want bot nav and night vision on the display. In general the system works and with some improvements I would consider it also on my next car. Things I am missing after 8 months I've been using it:
1) offline mode - would keep warning on HUD only in some circumstances
2) while the lens is cleaned together with headlights it still requires additional cleaning, especially autumn/winter time. So agree it would sit better behind windshield
3) cannot save nightvision under quick selection menu and split screen needs to be set manually each time
4) most importantly - it does not recognize people / animals in 100% percent cases. Could be fog (very poor vision with fog), dirty lens but also occazionally it just does not display yellow color on pedestrians / animals.
That said, I do use it daily and it also helps when blinded by other cars i traffic.