Certainly looks the part for a cycle lock. It will deter most opportunists thieves. Well made & looks a lot heavier than it is. It's length makes it easy to secure the bike to posts & will go through both wheels & the frame. How it will fare against a boltcroper I have no idea.
Don't know how it would stand up against someone actually trying to take my bike, thankfully haven't had to find out, but seems sturdy and looks alone should be a deterrent.