I was using a bulky chain and a padlock prior. I just switched to this feeling that it would be pretty safe parked outside the honors dorm at my university and my bike got stolen with it locked up using just this lock. For security, I can not say it is very good. Other comments, the lock rusted over 6 months, but still worked fine and the key was a bit off but worked alright
I tried this lock for the first time and the keys do not open the lock. Keys also feel very flimsy, so even if they did open the lock they would likely break. Pacific Cycle customer service number did not connect to anyone who could help and just asked if I had an extension number.
Please do not buy this lock to encourage Target to stop carrying such inferior products.