Nav system is a waste for most people.
For those of us to travel to other cities, it is invaluable. In rental cars (Hertz Never Lost which is a Garmin) and personal cars
Garmin with the females voice that give you direction is awesome.
If you do not travel, it is a waste but even in my own town I can put in a street address and it take me right to it.
One time I took a 12 hour drive from Texas to New Mexico and it took me right to the house in the mountains and never had
to pull a map. I just trusted the ladies voice. LOL!