I can see the brightness settings in the menu but Twilight is greyed out. I can manually alter the settings, but only for Night or Day and in my experience there are occasions when neither are suitable, hence the Twilight would have been useful. I heard that the 2012 disc alters the Jaguar logo screen to black rather than green, so I wondered if it also improved any of the other screens? I find the white screen too much of a distraction, due to the inability to select Twilight, as above. My Tom Tom is a better tool graphically, but takes too long to get a GPS fix compared to the Jaguar which is 'always on' and gets a fix immediately. Like you, I always carrry a map too as it gives a better idea of where you are in the world in relation to where you are going.