@Viss True that! Those gadgets are not only very often mistake people, but also lead not being aware or beginner drivers to pretty unpleasant or even serious accidents. I saw personally such cases many times. Sadly lots of people are very dependent on such things, services etc., instead of being able to think on its own hand, and relay only on the own experience behind the wheel, which is best thing, every driver can do. The well known "limited trust rule". Or even "do not trust them" one is it.