The unit wouldn't work on either of my vehicles because there isn't enough room beween the top of the OEM mirror and the roof of the car.I could see how this could be an excellent item, but may not work on newer cars. I have an 08 Avalance and 08 VW Beetle. I purchased for the Bug, but decided to try it on the Chevy which it also didn't fit.Make sure you have about 3 inches (best guess) clearance above existing or don't purchase. I'm happy with refund policy, but no matter how great it is it is still not as good as getting something that works upfront.:)