I am about to buy a lock for my new Trek SU300 and I have searched high and low for reviews and test results on flexable locks. I am fully aware of the high rating for the Kropnonite New York lock. But for my bike and my neighbourhood this is inappropriate. The only review I have found is this, for the Abus Granit Steel-O-Flex 1000:
Cycling Plus Magazine Review
"took five minutes of repeated blows to the lock case with both hammer and chisel. Its hardened steel casing dented slightly but didn't deform and the lock functioned perfectly. We blunted the hacksaw and after 5 minutes with the disc cutter we'd only cut slightly into the armour's surface."
Conclusion: The best cable lock available. Period.
But I do not know how old this review is.
What I am really after is the result from a test - in relation to other cable-style locks. And I can find no opinions relating to the Steel-O-Flex 1050, which seems to be an even higher spec to the 1000 and comes with 15 Abus stars.