The worst thing about these nav systems is when they're on in the backround they're following you and your short cuts around.Fast forward a few years and everyone is going the way to you used get through much faster.Short cut fukked.
A good example of this is Hanover street east that used to be a relatively empty and quick way to get down to the Marker hotel area is now just as busy as Macken street during the rush hours.I had one American couple get out of the car because the traffic seized up completely.Yer man was on a walking stick and he made through faster than me.Absolute kip down there.
I don't like Google maps as the passengers believe it to be never wrong and start making noises when you deviate from the suggested route.