I don't have any security on my bike at all. However at work it is parked in a private car park. To enter the car park you need a security pass for the main barrier. There are cameras EVERYWHERE.
At home it is parked in my brick built shed. The car is parked in front of the door. The car is alarmed so to get to the bike they first have to move the car. Even if they manage that, I have the door to the shed on a sensor and also a PIR inside the shed. If the door opens or the PIR sensor picks up movement the main house alarm will be triggered.
Think it should be safe enough.
Saying all this, anyone that has seen my bike will know it really wouldn't be worth the risk of getting caught to steal it.
