Just for fun, I set my phone running GPS WPX Lite next to my Garmin GPS on our ride from Eagle Lake Wisconsin to Rochester, New York. The odometer readings were the same as were the the GPS parameters and speed. My Garmin does not really have a navigation compass and the compasses on GPS WPX Lite run EXTREMELY smoothly. What really sold it for me (not that it cost anything) was the option to turn the compass control from magnet to gps mode. It is also great that the gps data gets backed-up for power failures. This is a great free GPS definitely worth getting.