I purchase a 305 several year ago now for my bike . after about 2 year it start lose its ability to hold the satellite and would go into pause mode and would not hold a charge but for a short time . I send it back and get a refurbish model . after about a year it simply would quit work mid ride even while show a full charge . I send it back and get another refurb at a cost of $ 79.95 . now this one be not want to find sufficient satellite , so I be have to start the ride without the GPS , which really suck . usually it will finally hook up to sufficient satellite so that it will start record datum . so yes , I absolutely think Garmin be JUNK . too bad they do not have some gp competition but even so I will not buy another Garmin .