As a rideshare driver, i need to keep my phone right where i can see it clip it right on the vent ( don't like to attach it to the dashboard or window ) my old one would rattle around in the holder and fall out on the floor LOL , But not this one you put the phone in and the sides retract holding it in place , i drove around few miles with no problems, went thru a dirt lot with some potholes just to test it and the did not move . im really happy