Bike locks are generally irrelevant. If people can't steal the entire bike (which they usually can despite the lock) they can take off most of the parts - the tires, saddle, handlebars etc (whatever you have not wrapped in a lock).
Pretty much all locks are like that: Some determined folks will take a work-around or take what they can. But they also do what a lock is supposed to do: they deter crimes of opportunity. You bike is no longer as easy to steal as the unlocked bike.
