I bought this lock after having my previous bicycle stolen the first time I parked it at my university, although safely locked with two locks to a sturdy structure in a crowded area. For necessity I've had to park my new bike to the same spot, of course not without any fear, but with the D1000 I haven't had any problem so far, and it has been more than a month. I think there's nothing safer than locking your bike with this in a busy area.