Locks that work

Has anyone else got one of those Xena alarmed disc locks and having issues with it? Mine seems to be a bit oversensitive. The security guard in the car park where I leave my bike during the day had a proper whinge at me yesterday afternoon as it kept going off apparently.

Mine's fine, only goes off when someone moves my bike, or a bike that is locked next to it, and it jars it a little. I've had a few instances of it 'arming' in my bag - but thats generally because something metal has got inside the clasp section (which I believe has a magnetic sensor) - always much hilarity when my bag starts going off at the pub.

Sofar I havent found it to be too sensitve to wind/rain - although winter will be a truer test. As GA2G says, I would get it swapped out.