Wow, I always used the cable and combo lock cause I wanted to make sure I had both wheels secure. I never had a bike stolen when locked up. I did have it stolen out of my apartment once. During college I rode a trasher so I never had to worry about it too much. Watching the video was wild.
Good information, thanks. I have a Xena alarm lock. Not good. It will not even fit on my "very exotic" Bandit 1200's front disk and it is a real struggle to get it on the rear disk. One of the last times I uesd it, it started beeping for no reason and resisted all my attempts to shut it off, even after I removed it from the disk. It beeped 'till the batteries went dead. Not recommended!
I have a Xena as well, and have been relatively happy. The unstoppable beeping you refer to is actually a low battery condition. Replace the batteries and it should work normally again. That is the Xena's main weakness--it eats batteries. I'm lucky to get 1/2 a riding season out of a set, and I don't use the lock very often since I have a garage and a relatively safe place to park at work. The battery issue is made worse if you leave the lock out in the temperature extremes as I do. A 110 degree garage doesn't do your motorcycle or alarm batteries any favors.