Right away I've noticed that laces are thicker than other similar products (I've used 3 different brands before). As far as strength and durability, that's a plus. Rest was a nightmare. Fitting those laces in my athletic shoes was hard. They are NOT a good fit for athletic shoes. Half way through me trying to wiggle those laces into provided locks, I was cursing and bleeding. Very tight springs and small holes of the locks made it a nearly impossible task. I even tried using different locks I've bought and used previously - laces were still too thick for those. Someone messed up royally when pairing up these laces with smaller locks.
Bought this product because of color options, reflective feature, and price. Was not worth the struggle in the end.