With its paddle mechanism, it was easy to attach the suction cup firmly to a car windshield. When I drove over rough roads, the suction cup held without a problem, while the hinge and ball joint also maintained their positions without slipping.
The adhesive pad did not work as well. Fresh from the box, the pad held a smartphone in place very well. After I removed the phone, there was no residue or any stickiness left on the phone's back, as advertised. Over a couple of weeks, the adhesive material began to feel less sticky, although pushing a phone against it still resulted in a firm-feeling hold.
When road-tested fresh out of the box, the mount held a phone firmly in place over many miles of driving. Retested after a couple of weeks, it initially held during a road test, but then the phone dropped off after just a few miles.
During the time we tested the Clingo Universal Car Phone Mount, it seemed that the adhesive pad became dirty, and lost some of its stickiness. Clingo advises simply washing it with warm water. After giving our mount a bath, I found the adhesion was restored.
The Clingo Universal Car Phone Mount initially appeared to be an excellent way to mount a smartphone in a car. It allowed good positioning for visibility and access, and it was easy to attach and detach the phone. However, the fact that the adhesive pad needs frequent washing makes it substantially less convenient, as most people probably would be loath to pull it out of the car every month to clean it.