iPhone Car Kit with GPS Reviewed - Impressive performance boost!

While the iPhone has arguably revolutionized LBS, its GPS performance
(Globallocate Hammerhead II internal receiver) has always be
criticized so the TomTom Car Kit with its built-in SiRFstarIII
receiver was very much anticipated...with good reason it seems :
http://www.gpspassion.com/forumsen/topic.asp?TOPIC_ID=129583 and
http://www.gpspassion.com/forumsen/topic.asp?TOPIC_ID=129583&whichpage=2#905658
it's night and day !