One car has vertical vent louvers so it does tend to sway left and right on some turns

The pivot works pretty well, but I found that when removing the mount from the vent of the rental car, the rubber pads came off the mount and stuck to the vent louver

and I can’t remove it from my vent louver

It clamps on easily to the vent louvers and really hold the phone in place yet simple and easy to remove

The others I've tried, after falling off and after awhile the rubber wore out and the metal prongs scratched my vent louvers.