I've been very happy with my
ProClip. For those that don't know, it is a "two piece" system -- you buy a piece that is specially designed to fit your car and then a second piece for the phone. Because of this, the mount is very secure and the phone, while still secure, is much easier to take put in the holder than other mounts. The only downside is the price, though the car half of the mount should last the life of your car and the phone mount can be transferred and used with the a new car mount, should you buy a new car.