Interesting knot. As I stated my shoelaces are usually the cheap ones that come with the shoes, so come undone fairly easily (adds about 2 seconds to untie). Quality laces would be much harder to remove. I have been tying shoes for so long it is hard to even do the other foot first, let alone learn a new knot and to overcome 45ish years of tying habit, hell I usually tie in the dark hehe