I was nervous about buying this because of the mixed reviews. I was also nervous that the limited number of codes (only 10,000) would make it too easy to break in. I only leave it outside when I need it and I point my webcam at it to deter attempts to break in. It has a cover that hides the wheels so a casual observer might not know it was just a 4 digit code. My best guess is that it would take about 2 hours to break the code so it would need to be a determined thief. I wish they made it with a 6 digit code.