Imagine driving along with this thing in a city you don't know and just when you get to a junction it turns off. This keeps happening, and then it doesn't turn on again and when it finally does it says 'Don't use this whilst driving!", Health and Safety over the top. Also it keeps zooming out automatically so in a city with lots of small roads you can't tell exactly which turning you should take. Also it tries to take me down one way roads which have been one way for ages. I've used it in Paris and London and it just added to the stress of driving that I eventually threw it out the window in anger and used my android phone instead.