I had let me move from the descriptive account that this mount has a special adhesive layer on the suction cup, which is to ensure that the suction cup to hold even on slightly rougher surface, like a car dashboard. So short and not well: the suction cup holds just on glass or completely smooth surfaces. But on the dashboard of a car holding the sucker less than 10 minutes. I still have the test done on my desk, which has a completely smooth and flat plastic surface. Here again, the same result. After 15 - 20 minutes, the holder falls over easily. So shall not be liable to the suction cup, nor the additional gel layer. Just to avoid demands: Of course I have the land to which I wanted to raise the bracket thoroughly cleaned and degreased so. This support does not hold. In addition, the magnets will hold the smartphone even just meet, so their task. On a trip through some bumpy surface and the cell phone falls, the magnets are weak. The holder can unfortunately not do anything!