I do use OSMand a lot for my bicycle tours. I download the map for the area and keep the phone offline so nobody bothers me and the battery lasts longer. However when planning the itinerary I keep looking at the satellite view of Google Maps because I want to get an idea of the terrain and of what the streets and intersections really look like. Then I place markers on OSMand and use them when I'm cycling. Using OSM and nothing else would give me many surprises on the road.