This product works exactly as advertised. In fact, based on what I had read in the other reviews I would actually say that it works better than advertised. The suction cup works so well that the only thing I can figure is that the person that had problems with it did not understand how it worked. It is not the standard type of suction cup where you simply press it against the windshield and hope it holds. This suction cup works by placing it against the windshield and then turning the knob counterclockwise in order to pull the center portion away from the windshield. As it does this it creates a vacuum seal that so tight that you are more likely to dislodge the windshield than you are to remove this device from it.