Unexpire as back on!
Any bike lock will stop a junkie/chancer from taking your bike. No bike lock will stop a professional thief, but better locks will mean it takes them longer to take it. Bolt cutters, and cordless angle grinders/reciprocating saws will get through any lock (or what you've secured them to).
Rubbish lock. Only use it if your bike is worth £15 or less.
@17:35 The thief isn't gonna steal it because it's too much work to get no money (lol)
Tbh, had two bikes with those fancy gold standard locks, they didn't last much, bought one of those, so far so good. I think is more a matter of luck than the lock quality itself. With an angle grinder, it is the same, one of those, or one U-lock, you will get stolen anyway ;(