I have watched various YouTube videos on the strength of this lock/chain and it appears to be very difficult to cut/open. Purely from an visual standpoint, the thing is very intimidating. I am no thief and as such don't know how they think, but I would speculate that when they see this, they keep going and look for easier pickings! This thing lives up to it name of BEAST!
I couldn't believe this thing when I saw it...It's Huge! and heavy! I don't think I can carry the chain with my bike but the lock itself is a monster and it fits perfectly through my rear pulley. Using just the lock on the rear and locking the handle bars up front is going to be a big deterrent to thieves.