After 7 months of use (1 month guarantee) Axle just broke (see picture). I just intentionally tightened it with a small wrench and only by hand, so I doubt I overtightened it. someone from Abus Mobile Security. They asked me to resend all receipts and photos and then stopped responding to emails (that was 8 weeks ago). So I don't think they care. Worked fine for 7 months but I find it a bit pricey considering you have to buy 2 a year. And I got much better customer service from some unnamed Chinese companies than this supposedly famous German company.