GET IT FROM AMAZON.COM..:hmmmm::hmmmm:
My car was stolen with this device properly attached. When I retrieved the car, the busted AutoLock was waiting for me on my front seat. The AutoLock's shorter metal "arm" was bent out of the way (separated from the rest of the Autolock by about an inch), and the brake pedal face bent slightly, enabling the AutoLock to slip off the brake. From articles I've read about the AutoLock on the Internet, it's length is a major weakness: it can be used as leverage to bend the (relatively) weak metal arm and disable it. Either that happened, or a crowbar was used to bend it.
Bottom line: don't rely 100% on this device to protect your car. Nothing can do that. It is only a deterrent, just like the Club, and will not prevent a determined thief from taking your car. However, realizing the flaws of the AutoLock, I can say that now I own and use BOTH the Club and Autolock, and just hope that the work to disable this tandem is enough to discourage the next would-be thief.