I tried my android phone again yesterday and it's pretty good but instead of keeping me on two major highways and making one right turn to reach my destination it wanted to take me on back roads with 6 extra turns and was only 2 miles shorter.
I like the gps for things like telling me how far a McD is but as bighatnohorse said it's like a good friend that is sometimes unreliable. For the few hundred miles that I go in one day I can usually look at maps on my computer and remember where to go. Overall it may just be one more of those things that I'm actually better off doing manually and exercising my old brain rather than have a robot hold my hand. When the robot fails for whatever reason it's just me sitting there dumbfounded.
I also seem to find that I'm more aware and alert if I have to watch for everything myself and if I had a conversation with someone I could actually remember the roads and how we got there. They say that using crossword puzzles or puzzles or things like that are good for old brains so maybe going on a trip and mapping it out and following it step by step are similar. Whatever works for you.