I have one, the battery meter is comically inaccurate, it will say I have 0% battery life and keep on running for hours with the screen on (no backlight) while paired to a Varia radar and a HRM. The fact that it is inaccurate does leave me feeling unsettled as I dont feel I can rely on it. On device map routing is lame. However I can make a route using heat maps on the app and sync it to the device so thats not too bad a compromise.