This lock is extremely heavy but it's great. I leave it at work so that I have less weight on the bike. Top marks!!! Bought one for the other half also. We've still got our bikes and others have been stolen around ours. What more recommendation is there?
Bought it to comply with bike insurance requirements as it is a gold level lock, you will want to carry this lock around as it is very heavy. Bought with a kryptonite 7ft cable, which makes a comprehensive security package.
I leave my bike locked to a street sign outside Waterloo station each night after work. It's been there for three years of nights every weekend and even when I go away on holiday. It is locked with this lock and a kryptonite cable through the wheels. The proof of the pudding is the bikes is there every morning I put that down to this lock and parking the bike in an open visible place.