For iPhone 6 Plus absolutely not recommended

I have the support now tried several times to install in the car, but it falls down again after a short time. During the trip I never could mount the test, because I have never managed to start my car before the holder has not failed again. Very sad and after my iPhone is very fond of and I do not like it can fall constantly in my car, I have the support unfortunately degrade again. Has the product because no one tested? In addition, it is regrettable that you have to remove the iPhone from its case plus 6 to clamp it into the bracket.
I advise clearly on the purchase.