I will say this.. I like to back whatever I use with paper maps. I've seen some "Strange" routing on the GPS. Plus paper gives me a larger view.
I also engage brain before starting engine... Why I say this.
One CG I used to stay at if I went to visit Darling Daughter at one point the GPS would tell me to "Turn left" Well, legally I was turning left but ... Physically I was going straigt.. To the left was a fence... If you just listen to the GPS.. Well there are TV commercials about that.. "Turn Right" (Crashes into flower shop) "In 800 feet".