I recently researched the Edge Touring since my old Garmin eTrex was pretty sorry at pre-planned turn-by-turn; sadly the Edge Touring gets rather negative reviews & it seems Garmin has put little effort into improving turn-by-turn capability. & Edge Touring has a built-in battery so one can't carry spares. Phones can do a lot sure, though perhaps getting a reasonably-priced GPS might be a sort of insurance in case one gets lost & phone is getting low on battery charge. One can print out Google Maps portions at home before the tour though I guess that would be more if one has a fairly specific predetermined route.