I don't use the gps on the iPhone. As mentioned it just kills the battery. I got a garmin 605 with map of Europe and used it properly this week riding in Suffolk. I mapped some of the rides in mapmyride (brilliant mapping tool) and put them into the garmin. The garmin crashes a few times mind but you just switch it off and restart and it is fine. I guess a pain if you want to monitor your performance but the miles you have done are still there. Apparently I have the older software so an upgrade will hopefully fix it. It is a pleasure not to have to read maps every so often. Yesterday we did a 115k ride with it and it took us on really nice roads. The battery life is 13 hours. It is great for walking too.
I don't use the gps on the iPhone. As mentioned it just kills the battery. I got a garmin 605 with map of Europe and used it properly this week riding in Suffolk. I mapped some of the rides in mapmyride (brilliant mapping tool) and put them into the garmin. The garmin crashes a few times mind but you just switch it off and restart and it is fine. I guess a pain if you want to monitor your performance but the miles you have done are still there. Apparently I have the older software so an upgrade will hopefully fix it. It is a pleasure not to have to read maps every so often. Yesterday we did a 115k ride with it and it took us on really nice roads. The battery life is 13 hours. It is great for walking too.
The iphone is great so go for it anyway :)