They just don’t work, homie. It’s estimated that false alarms occur about 95 percent of the time. Perhaps if you have a Ferrari F430 and it’s 1983, then yeah, maybe go out and get yourself one. But studies show that most car thieves are now skilled enough to disable your alarm within seconds. In 2011 you’re better off installing a security GPS tracking system. This way you won’t annoy your neighbors while you’re on vacation. Thanks.