I got this shade not to keep the sunlight off the screen, but to keep the screen from reflecting off the windshield at nightand it works well for that purpose. Unfortunately, it adds just enough weight that the whole unit shakes more over rough roads and needs to be adjusted periodically. I would prefer a ""soft"" shade like the�322 GPS Shade�that I purchased for the smaller Zumo Garmin GPS on my motorcycle. That shade is much lighter, but apparently those are not made for the 6-inch nvi. Nonetheless, this works fairly well for now.