Bests & Worsts Reviews from Amazon

This lock is not only effective against theft, but also assault, robbery, terrorism, bullies, you name it. Just pull it out and start swinging it, guaranteed to kill anything that's human. You can even use it to repel bullets, although you shouldn't try swimming with it. I almost broke my toes on several occasion, when it wiggled itself out of my grasp through its sheer weight and hit the floor. My carbon fiber bike is about the same weight as my friend's steel bike with this monster, and I always fear that it will rip through the bottom of my backpack. That being said, it probably intimidates any bike thief before they even attempt to break it. I lived in Oakland beside a public high school (go figure what all these little buggers do in their free time. Stealing bikes, that is). At the bike storage area of my building bikes get stolen left and right, but my sweet little ride remained untouched in the eye of the storm, as though it was protected by a spell. Perfect if you want maximum security, not so if your back is not strong enough to carry it.