i feel fortunate that i work in a very well protected area, i can see my bike from my office window, and the complex i work in has a security force constantly driving the grounds.

i use a cheapy u-lock which i just leave attached to the bike rack on the days i bike commute to work.

thanks to the OP for this post though, good insite.

also, it is interesting to hear that theives break locks, never pick them, i wouldnt have known that.