I assume you have no GPS problems then?
So having decided to use my phone, I now hate google maps....

Why does it have to be so difficult. Exported the TomTom itn routes, loaded these into google maps as .kml file, saved a new google map and.....yep you can't access them via the iphone google maps app, only via the google web page then it does not seem to let you actually navigate via the route. Or am I missing a trick?
So other iphone users what navigation app do you prefer? Might just go back to my age old satnvav at this rate.