I eigtl. Wanted just a simple Car Charger and came across the Kensington because it was recommended to me by Apple itself. The part does what it should do. Car adapter into the Ziegaretten lighter plug, connect cable to the USB port and connect the iPhone. When I drive to work I need about 20 minutes while the phone is about 15% charged. Furthermore, you can then take the separate USB cable to work and connect it to the PC, if you, like me, the office has also ;-)
I would buy the charger immediately. On the part of gibs nothing to complain about!