I have the bracket mounted in a Golf 4 on the flat surface of the instrument panel directly below the windshield. Keeps my Galaxy Nexus flawlessly, even with heavy sunlight. Can also be installed on slightly rounded or porous surfaces. Here, however, you should stick the enclosed circular washer first and amplify it until the bracket to the stop. I did not use the washer. The biggest advantage of the mount is that you're not limited to just one phone model. Perfect for people who often change their phones. Add to this the various mounting options. Whether wheel, dashboard or possibly even upper legroom.