It is sad to see that Ian is struggling to fund the site: https://www.fieggen.com/shoelace/support.htm
"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.
I've been tying my shoes for a couple of years now with his "Ian Knot" method, and it works very well. I never mastered the asymmetrical single-loop method, so all my life I'd been doing the bunny ears. Maybe the asymmetrical method doesn't make sense to me for a symmetrical knot. The Ian Knot makes more sense and is easier and faster.
Others in the family tried it too, but I don't think it stuck with them.