I just spent a week on vacation doing some extensive driving and sight-seeing using Navigon as my GPS/turn-by-turn navigation. I was running it on a 3G iPhone, in a windshield mount. I travelled in the city (Milwaukee) and to some remote locations (Washington Island). I also used the FM transmitter in my power cord to play tunes while the navigation was running. Briefly - here was my experience... PROS: Never lost or had to wait long for a GPS signal. Routes were excellent and it always got me where I needed to go. Turn timing and lane illustrations were excellent. It was a pleasure to use and made me wonder how I ever travelled without in-car navigation. It quickly and accurately recalculated my route when I decided to take some detours along the way. CONS: The app seems to take a long time to load. (This was a little frustrating when I left the app to change songs or albums and then had to re-run it.) There were some times when I shifted it from portrait to landscape and it took a minute or more to make the shift. The voice sounds like a 60 year old lady who smokes - a lot. (Why not a younger voice - or even a cool British guy <grin>?) All in all I was VERY pleased with Navigon on the trip!