The support is good, I use the clip for the ventilation grill, the stem of the windshield holder tremble with the weight and size of my phone (LG G3). I also dreaded the click that opens the clamp, but my phone is off I think the system will quickly tire. I still put 4 stars for the price of the kit and its contents.
Beware still have rubrics (tested in a new fiat punto for example it's not terrible)