I really like nav apps cause the good ones are easy to use and reliable. The developer did a great job on the design and interface. Anyway, it works every time for me. I read a couple of comments about the app not working and I think I know maybe why - you need to use the "double tap" as it says in the intro. Just follow the instructions. Id really like to see some kind of "voice" feature added so it can guide you instead of having to look at the screen. 5 stars for me... Really good app.