Dont know how my wife and I would have gotten around Paris w/out it. The gps and subway map are most helpful. This app is best used when you save your favorite places, we saw twice as much as anyone in our group. Its always nice to know how far you are from the sites to know whether to walk or ride the subway. The best part of the app is it doesnt need internet access which is very expensive in europe, even with the international data plan. It great within the city, looking forward to using more of them.