Anybody here use something like LoJack or something similar

to keep track of their ever appreciating valuable muscle car???? I was doing a little research on LoJack and also came across this company called Zoombak that offers a GPS locating module and monthly service. Just wondering if anybody here has had any experience with this kind of vehicle security. I'd hate to take my Barracuda out one Saturday and have it stolen by some scumbag.