Hi Faubertr, I found that the Sat nav on my previous Yaris was so user unfreindly and difficult to configure, I opted for the Design model this time .where the sat nav is an option, did not take up the option and decided to get a stand alone Garmin which is so simple to use and includes lifetime mapping, nicely mounted using the centre air vent slots above the sceen, we are not all whiz kids and I also find the 3 operating dials for the air conditiong easier to operate than the auto climate control arragement, sometimes simple is best as keeping your eyes on the road is more importent