This is a very handy and practical universal car mount for smartphones, including iPhones and Samsung Galaxies, I use mine with an iPhone 6. The suction pad for attachment to a car windscreen has a reassuringly tenacious grip. You depress a lever on the base of the mount to secure the attachment, and then pull the lever up to enable you to pull the mount away from the windscreen. The holder for the smartphone has adjustable arms, which hold your 'phone very securely, but not so tightly as to leave marks on either your 'phone or its protective cover. The mount can be rotated through a full 360 degrees, so that you can view your smartphone vertically or horizontally. The holder comes with a circular 3M adhesive pad, to hold the mount on surfaces where the suction pad doesn't work, such as breathable surfaces. However, my own experience is that the 3M pad doesn't work. I've placed the 3M pad on the dashboards of a Suzuki SX4, Subaru Impreza WRX, BMW 335i and BMW 130i, and it was unable to hold the mount in place.
In short, this smartphone holder works absolutely fine on car windscreens, but it doesn't combine well with the 3M pad, which means that I can't use this device on top of a car dashboard. If you want a dashboard rather than windscreen mount, you might want to look elsewhere.
Thanks for taking the time to read this review.