Where has this product been all my life? This is the single most useful navigation aid I have ever bought of any type. Together with the free to download app this has revolutionised my cycling and hiking. It is extremely easy to use, reasonably easy to set up and very easy to understand. Any gripes? only a minor one. It loses its charge if left alone for extended periods so make sure you charge it up before you go. Once charged, it lasts for a long time though. Cannot prise this gizmo high enough!