If you've seen the road map/gps unit that is available in Japan for the Impreza, Legacya nd Forester you can just use its screen size as a reference. The screen for the map isn't too large. You still have all the prior visibility as before. The map also has your speed and rpm super imposed on the map so you can still monitor your car. If I find the info online somewhere I will post the link for you. Pretty cool toys.