I thought you might appreciate a long-term review of your wonderful shoe clips. I got mine at either the Frankfurt or Berlin marathon expo in 2014 or 2015, so long ago I can't remember, and they've only just got to the stage of looking like it might be a good idea to buy a spare set. In that time they've traveled well over 10,000km mostly on road but also through mud and sometimes water too. They have never once failed to keep my laces in place and I've never had to interrupt my running to re-tie a lace. They have done exactly what they were meant to do, faultlessly. Well done for designing and making such a good product