very happy with using iphone instead of garmin. I'm hesitate to admit that I'm GLAD someone stole my garmin. The iphone with ridewithgps is really terrific. I bought an extra battery pack (I got 4 hours exactly from the fully charged iphone with no battery pack) and don't yet know how many hours I will get but definitely more than enough for my rides. Love the gps vocal directions including announcing regroup points and all-important coffee stop that were included in the originally created tcx file. Hope this helps others if they hate their garmin as much as I did!!