I thought it was worth pointing out I have used a Rider 1 with one of Egon's bungees since new. I don't use the unit on the bike much but do use it most days with the car mount. However in the past 3 years it must have done a total of about 6000 miles on the bike without a hint of any problem.
Without the bungee I a sure I would be using a garmin by now.