First, it should be noted that this chain lock is ABUS typical very well made. The blue fabric cover is riveted clean with black snaps on the last chain sliding Dern, so it can not slip. Paint damage is counteracted in pleasing manner. By choosing a colored jacket (blue, coral) also may have the look of the castle come into play and deter casual thieves appropriate.
In addition, the castle entrance has an automatic, metal locking mechanism which reliably protects the lock cylinder against ingress of dirt and water. Nor can the closing mechanism very smooth open and lock or close.
The castle weighs about 850g with a length of 75cm with 6 mm square chain strength. That reminds me of this Catena beside a Kryptonite Mini as a second lock is used for impellers, I wanted to get the best possible compromise between weight and strength. Therefore, I have decided, inter alia, against the Abus 810 (8mm chain strength, 85 cm, but! Approx 1700g difficult) ...
Transport either wrapped in external pocket as it can be folded well or to the seat tube closely, several times.