"Ian's Secure Knot" is just a rebranding of a knot that is also known as the "Berluti knot", "Tibetan Trekking Knot", "Sherpa Knot" or the "Double slip knot".
It's a great knot, the best way to tie your laces, but spin it as much as you like it's just a bow with a double twist on the second twist, and has existed since long before Ian or Berluti tried to claim it as their own.
And I second that it's the best knot for tying laces. Especially if you have synthetic laces (common on some trekking shoes) that come undone easily.
Wonder if there is a way to get the loops to stay sideways. With thick/stiff laces, they seem to end up orienting themselves up-and-down.