Pleasant is the coating of the castle. Scratching the frame is actually impossible. Unlike a padlock is the folding lock when folded more compact and maintenance easy and flexible.
For the length of 90 cm you should absolutely make a decision. The castle is also available even shorter, then it will be difficult, however, depending on where you want to chain the bike or if you want together two bicycles chains. There is also a version with 120 cm. The thing I had the bike shop already in hand. In the then still the bars slightly thicker (higher security level), making it incredibly difficult and unwieldy the castle, and there is clearly reflected in the price.
On the handling of the castle you have to get used to. If you pick up the thing from the quiver, the folded inner rods fold in the same and smack down when you're not careful. Of course, riveted bars are not as flexible as a steel cable or a chain, but when you get used to the thing, completing works great.
What I find amazing is that the lock when folded is very compact and can be screwed with the supplied rubber quiver at the bottle holder device. Here, however, one has to keep in mind: The castle itself is so long around the 25 cm. Just so long is the quiver. In order to pull the castle straight out of the quiver you would need about half a meter space on the bike between the lower edge of the lock holder and the next bike rack. Now it comes down to where the screws are placed on the bottle holder. For me it is already tight. I always have to turn slightly to the side of the rubber sleeve, if I want to pull out the lock or plug it in again. This is a bit annoying. For emergencies in the delivery is still a breits elastic Velcro included, which allows you to attach the quiver of a frame bar.
What one also has to be clear: This castle is really quite difficult. Who pays meticulous when buying a bike on the weight of his bikes, so the thing is possible, athletic and fast, the bangs with this lock the same again a kilo ballast to the frame
Overall, a really good, practical and valent Castle, which is offered here at a very interesting price. I would buy it immediately.