I really wanted to like this app. The concept and the FEATURES are awesome! I liked the free version, and upgraded in order to get truck specific routes that properly used all the necessary variables you would expect. But, the navigation portion is glitchy (an understatement). The app won't work in the background for more than a couple of minutes. It consistently crashes when signal degrades, and i LOOSES your navigation inputs, forcing you to restart the nav process. Very frustrating.