"My wife & I purchased two 560G locks (with matching keys) the end of May 2016. Know that we are serious riders @ appx 2,000 miles/yr and we absolutely love our Altor locks. Once when we biking together we even manage to lock both our bikes 'round a telephone pole (connecting both locks in series). We are both retired, have been biking together for more than 20 years and we feel that our Altor locks are the best locks we've ever owned. It was definitely a worthwhile purchase."