The lock securely holds super, and also the idea of the partners castle is great. But I have my castle now a year, and I is the second key aborted. The first time, everything went well and the broken pieces could be pulled out with pliers. But now it is so far should fall into that only one Flex helped to open the lock (btw. It went within 20 seconds). So when a lap this price range it can not be that the material of the key is so deficient that the fast break. That was my last Abus lock.