It works exactly as it says. Keeps the computer secure when you are not near it to stop 99.9% of thieves. Also its pretty non-intrusive and lightweight to carry around. But for all the mac users blaming this product for warping the laptop, its not Kensington's fault, its Apple's. Think about it, they sacrificed build quality near the lock for slim-ness. Its a product design. You wouldn't blame your headphone maker if your mac bent every time you put in the headphones. Over all report to apple if you want it changed.