If the inside of your car is 70-80 degrees farenheit, then the clingo will work perfectly. It attaches and detaches perfectly. The problem with it arises when your car is really hot or cold. I go to school during winter in upstate New York and spend summers in the lower mid-atlantic. During the winter, this thing is unusable because the coldness reduces the stickiness of the pad so it will constantly fall off, nearly being a driving hazard. During hot weather, like I've had recently, the pad is TOO sticky, making it a hassle to take off, making me fear I will break my phone. It will also leave a sticky residue on the backside of the phone.
So basically if the inside of your car remains a constant temperature, this stand isn't bad, otherwise, it can be a pain, and I haven't found a way to fix it. I'm going to try keeping the clingo pad inside my house, at a more constant temperature and only putting it in my car when I'm using it.
Also, you should make sure that there is plenty of space around your vents for the contraption to fit. I had to flip the base attachment of my clingo upside down to fit.
Update: I ended up throwing it away. I was really rooting for this device and hoping it would work correctly, but it is more of a hassle than it's worth.