Mounted on my ski boat.  I actually started with a more expensive, windshield frame mount mirror but it would not adjust to the correct angle.  Provided you adjust the pivot ball tension screws first, if necessary, this mirror easily moves without breaking and stays where put.  I look over to top of my windshield so I have this mounted just below the top, out of my line of sight.  I can easily move it to the walk-through windshield (on center) when it is closed or to the driver's windshield when the walk-through is open.  I can't imagine a better mirror for the money.