I received this Burglar today. After super easy mounting of the support that comes with 2 screw lengths for different frame sizes, I tested it and it absolutely does not move despite the rocky nature of the road. The supplied cable is really essential flight against the saddle and if you ever do not have the opportunity to spend the U street furniture. I do not regret my purchase, which, after many comparisons, can be most sensible for the safety of my bike. VALID!