I am planning to take off for a long bike ride starting in about a month. A fast/reliable mapping app is almost a must for me. I downloaded map tiles manually for my approximate route within Mappero using Google Maps/Satellite and Terrain options to a quite detailed level. Offline mode is quite reliable so far. I need to get a couple extra batteries to keep the phone going. Not planning to record the whole trip, just use the phone as a navigation device.