Used on a 10-day cross-country trip on a large Uhaul truck. I was nervous about leaving the truck - and all my belongings - unattended, so every night when I parked the truck I would tie it to the front wheel to scare it away. The quality of the lock cylinder is not very good, so sometimes I worried about removing the clip. But after some effort it always unlocked and loosened. The trick seemed to be making sure the key was 100% fully inserted into the cylinder before turning. In general I recommend.