myBookAlarm can't prevent your Mac from everything - but it will scare off potential sneak thieves and protect your important data. And should your Mac really get stolen - myBookAlarm can help to identify the thief, prevent him from selling it and can help you to get it back quickly.
In case of an alarm you will immediately get an email and SMS notification containing a mugshot taken with the iSight camera and if you've enabled the 'stealth mode' on a restricted guest account - myBookAlarm will periodically send its location, IP address and screen shots - thus you can see what happens on your stolen Mac and tracking it down is a piece of cake.
Of course myBookAlarm can't replace horse sense and you have more to do to protect your Mac. In the help and manual you will find detailed information on how to properly setup myBookAlarm and what else you can do to secure your Mac.