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So there is the (i) hardware issue (is the aGPS antenna too small (it's a matter of whom your choose to believe, Pogue or Joswiak) and (ii) software issue. The former cannot be corrected in this model and the latter better be corrected real soon.

(i) I'll believe my own eyes and my own experience which worked perfectly fine and at least as good as a dedicated satnav and whilst google maps is no sat nav, it does work as a basic means of getting from a to b.

(ii) Just a matter of time.
 
guy posting right above.

Dont compare google maps to a legit gps program. Its not intended to be any sort of "competition" for turn by turn software.

I just drove 5 hours yesterday and sporadically turned on google maps to check where I was and see how the gps was holding up...

Under my roof (though its a canvas convertible top) it was able to keep up with me very well. yes it might lag 20 meters behind you but my in car gps lags a bit as well.

It does follow the gps marker which I thought was pretty cool. and something I thought was really cool is that you can use gps in hybrid satellite mode making it very easy to tell how far off it was from your actual location.

Turn by turn will be developed. It will cost money. I will pay for it and gladly use it.

I'm in Muskoka (cottage country north of Toronto) right now, and we tried it out while driving, too. My experience was similar to yours, however, initially we had to open the sunroof and hold the iPhone up to get a signal. Once we did that, though, we brought it back into the car and it tracked us on our little backwoods roads pretty accurately. I thought it was within less than 20 metres, actually.
 
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