somebody try to take my bike from the driveway 1 year ago... they fail to broke the bike immobilizer and 280 kg of bike I guess don`t give them to much confidence to take it in a van. I don`t leave the bike on the driveway, the bike was just 3-4 times on the driveway in 3 years, but was enough. I guess the alarm has start the warning beeps and scare them. at this point I decide to chance the shity datatool alarm with the last generation of scorpio alarm. you have range half mile and if the place where you park is in this range, you get noticed by the pager something is wrong with your bike. this is not a cheap alarm but you can find some cheap alarms, around 60 pounds, with almost same features. with this alarm, the bike still start easy after one week of inactivity, so, is not fuckin` your battery. I have no idea about cheap versions unfortunately. I know most of you don`t like alarms, but for me this is perfect. you can set is to not make noises and you just get noticed on the pager. in my opinion an alarm is better than 10 chains and a garage... well, if you are not to faraway from the bike . ofcourse, if they want take it, they will take it, no mater what you have on the bike. just make it less tempting.