Its a good app but the GPS is not very reliable. I go mountain biking after work on the same trail regularly and I always get a different result. I recently rode two days back to back and the first day it said I rode 9.13 miles and the second day it said I rode 8.09 miles and it was on the same route. Im not sure if thats the apps fault or the iPhones GPS signal. I do like the apps voice feature that calls out your progress such as distance, average speed, max speed, and calories burned. You can also upload your results to Facebook or Twitter as well as geo-tagged pictures along your route with the camera feature.
Emmett Hargrove about SmartRunner Pro your GPS coach for jogging, cycling and marathon