[This review was collected as part of a promotion.] My car has weird, vertical vents which make it impossible to install a clip on phone holder. This cup holder phone holder is great and the positioning of the phone is better than a clip on would be anyway. At first, I didn't realize that you can twist the bottom to make the side panels come out to fit the cup holder tightly. If you don't use that, the holder will fall over, so make sure to figure that out and everything will be perfect! Make sure to also flip the little bottom stand out so it cradles your phone or it will slip out the bottom. I love this little thing! So practical!