I too have a pair of Salomon X Ultra 2 low hiking shoes. And a pair of Salomon waterproof membrane shoes, both with the quick lace system. I wanted to love them, afterall, it's my hard-earned money (even though i got both pairs at a good sale price). But i've noticed the quick laces DO loosen a bit during the day. not much, but enough for me to notice and have to retighten 203 times a day.