I went with ProClip as well. I found a universal phone holder to screw into the ProClip mount. Much less expensive than their "custom made" holders that I would have to switch out every time I got a new phone or my wife wants to drive my car.
The magnet ones do work great, I loved them. My new phone has Qi wireless charging, and the metal on the back of the phone prohibits the phone from charging. So, no magnet for me.