Well let me say after the first ride I am sold! Worked like a charm. But to the hatred! Why in the world would Garmin not design this expensive radar/taillight to have a safety tether? Seriously Garmin! Are engineers that lacking? I can say being a former mechanical engineer major! So what do you do as a consumer? You overcome and adapt an Garmin tether on hand just in case that crazy stupid rubber o-ring fails!