i use a pitbull and thus far no complaints. no-one has tried to break it yet though. but it looks and feels substantial and secure, and hopefully a bike thief will feel the same way. it's just right to go round a parking sign pole and your bike without hardly any extra space to wedge anything into. seems like a lot of lock for not a lot of money (about half what the kryptonite mini goes for).

i only use mine for 5-minute stops, so if i know that's all i'm going to be doing this is a nice $25 easy-to-carry alternative to my nyc chain.