May be the ideal product

I just fixed my iPhone 5 (with shell) on the windshield of my vehicle through this medium. The adhesion is excellent but the glass remains an ideal surface for this kind of product. I think the airtightness is enhanced by the gel is covered with the suction cup, which should help to maintain the same capacity for adhesion over time.
I have not done a lot of assembly / disassembly but this has just made each time.
The system of double rotation adjusts the smartphone screen to exactly the desired position.
The price that I consider a low has cost its fifth star this product!