After 3 months of use (about 1-2 times a day) the grip is always as good. The phone like in any position and jolts and vibrations of the car is not a problem. Think carefully before hanging on the air vent because once set, hard to remove it again. I have a Galaxy S3, the rear shell is rather thin, you have to hold the camera and the media for failing to pull off the hull as the grip is. But this is merely a helping hand to take. While replacing the transparent plastic strip to prevent dirt and put in place especially if the text is inscribed in white glue on the support. I recommend