We have used ours all over the NE, from MA, RI, NH, ME, VT and then down till GA.
We flew to DisneyFL a few years ago when gas prices were at their high and it was great to have our Garmin nuvi. We stayed outside the parks and used it to locate the closest WalMart and other restaurants. It was a great gas saver.
I am like Maxine's husband and rely heavily on my Garmin nuvi. We have two, one for hubby and one for myself.
Mostly all the (rental) cars around Europe have built in GPS
GPS will become obsolete soon is the constant hi-tech topic, because IPhones have everything in them.
So if you are thinking you might be switching to an IPhone don't get a GPS. Since dh has an IPhone he rarely uses his GPS as the IPhone has all those features and much more.