2+ for CH...how many of us have changed out coin batteries and put them in backwards...*silence* okay "--who will admit to it...! LOL :s
As for not having the Security Alarm/Immobilizer, with stolen bike statistics being what they are, it is a nice feature and certainly need be revisited only once every 2-3 years (for battery replacement) and beats thinking about going out to the parking space and seeing only that...
Here in Houston the thieves just drive up in a pickup, 4 dudes hop out and lift the bike with two 2"X4"'s, into the truck and they are gone in waaaay under 60 seconds. I have the security system because it came on the bike but don't have much faith in it as theft prevention.