Yes, I have had my car broken into twice. Both times it was at a mall, around Christmas time. They never got anything because I would not in billion years ever leave my handbag in my car. Who the heck does such a thing? I assume they were looking for packages because another foolish thing that people do when they shop is stash bags and packages in the backseat of their car and run back to the mall to continue shopping. I never did that, I suppose I've always been a "what if" type of person. I consider the risks. As for theft of the car itself, I did use a wheel lock many, many years ago. They do indeed work. Like any lock, theives can disengage them but it would take such a long time, no car theif would ever attempt it. They just move on to a car that's easier to start. However, a wheel lock isn't going to keep theives from breaking in and stealing anything you chose to leave in the car.