I know this mount does not include a separate GPS chip in it to enhance the iPhone's GPS signal, has anyone had any problems with their iPhone's GPS signal while driving? Please state whether you have the 3G or 3GS. I want to get this mount + the Navigon app for my iPhone 3G but I'm concerned on whether or not the iPhone 3G's GPS chip is strong enough...
i have had both 3G and 3GS ... in general the 3G is a little slower to acquire GPS signal, i assume due to the slow device not lesser GPS antennae ... while using Navigon, the 3GS acquires a signal w/in 8-12 seconds from icon tap to in app signal lock ... while the 3G boots up and acquires a signal in 20-30secs.
and while it shouldn't make much difference, if using a car mount w/o an enhanced GPS chip, i would suggest landscape with your volume button facing up - the GPS antennae is under the volumen buttons - might as well aim toward the sky
i've used Navigon originally on my 3G phone; now on my 3GS phone ... i will tell you that Navigon app runs sluggish on the 3G. if you plan to use the iPod controls, it laggs going between sub features w/in the app - big time. if you plan to primarily select a destination, then let it route you to that destination, it works pretty good - some quick multi-turns can lagg ...
keep your eyes on the next version release any day, v1.4 ... i understand that Navigon may have some performance improvements which will help while running on the 3G (and the iPod Touch devices)
and finally, i have to say that on the 3GS, Navigon runs like a dedicated GPS device ... no lag, no slug, no latency and a great overall satnav ... in my experience, it's dead on
if you are price sensitive, don't be tempted by the competition's lower pricing ... be patient Navigon will follow soon
Navigon

