The quality of the cable is sufficient absolutely fine and with a length of 120cm.
Of course, the lock offers no protection against professional thieves.
The cable, only about 10mm Druchmesser can with the appropriate tools quickly
be severed.
However, one may expect in this price range also otherwise.
Otherwise the lock fully meets its purpose. I've been using it on a daily basis
my city bike and have been using this product ever a sturdy lock on my side.