Don't go with cheap ebay stuff. You will save a few bucks, but it will break after a month or so, or better yet the first time you go over the railroad bump or pothole.
I know since a lot of your don't visit the main accessories section in Android Forum where I post my reviews (
http://androidforums.com/android-accessories/796475-twister-reviews-android-accessories-gadgets.html), I tested and reviewed most of the popular car mounts, and found Arkon Slim Grip Ultra (
http://androidforums.com/samsung-galaxy-note-2/694925-arkon-slim-grip-ultra-mount-car-home.html) and recently reviewed Arkon Mobile Grip 2 (
http://androidforums.com/android-ac...iversal-smartphone-car-mount-w-lots-pics.html) to be at the top of my recommended list. And if you really think about it, it cost just a little bit more than ebay stuff, but you get a quality product with 2-year warranty.