I have a lock now for about 6 months of use. My bike is often all day at the station. By night bars, at the university and so on. The castle gives me definitely feel good and there is so far nothing has happened. I have the 110cm variant taken and can thus connect the wheel (old steel Renner) so that the wheels are connected with the wheel and is fixed to a medium thick tree. There I can then wrap with 4 windings around the top tube that is relatively fixed dadrauf sits just wenns is bumpy slides, so do not bother roughly. Clear the weight is not small - no weight is not nunmal. Those who want the security of a tank should not expect the weight of a motor scooter.