I installed my no-name Chinese made in-dash GPS that I got off of ebay last month, one of those exact-fit type. Everything worked well-enough, not great, but good for $400. One thing that was horrible was the Rt66 Navigation software that came with it, which was crap. So I bought a PolNav software on a SD from ebay for about $25. For navigation, it was 100 times better than Rt66, pretty accurate too, a bit slow on satellite acuisition, but today, I discovered that it's worth its weight in gold: IT WARNS YOU OF RED LIGHT AND RADAR CAMERAS!!! It makes a loud annoying "ding" sound within about 1000 ft of approaching intersection that has those cameras. At first I didn't know why it was counting down the distance to the intersection, than I realized that every one of those intersections that it warned me of has a big old camara staring at me. It went off 6 times from my trip through DC and Prince William County, and sure enough, every one of the intersection is rigged. Don't know who make PolNav, but they ROCK!!!!!!!