The Garmin LED light provides a very bright light, and gives an extra alarming flickering light when traffic is following behind. The radar gives a safe feeling because it is linked to the Garmin Edge and gives a signal + visual. Battery is fine and lasts for several hour-long rides. Mounting is simple and effective for many frames but feels cheap and unfortunately not suitable for the Giant Propel. Purchased a saddle mount myself for a few euros which fits optimally (for any bike) and feels better quality.
this purchase provides peace of mind when driving in winter with a hat and scarf and struggling to hear from behind