I've been using the Ian knot for probably 10 years now, if anything it's easier to tie it tight since you can keep the tension on the first not held until the very end.
Re people saying the Ian knot doesn’t come undone: neither do my normal ones.
I’m a runner and it’s important for my laces to be exactly as tight as I need them to be. I’m wondering if others here aren’t as exacting with their knot tension needs.
The technique I use looks like this: https://youtu.be/_aAeI7p-Tkc?t=11
If you're doing it right, the result is not like keeping a finger on the slipknot - it's better (and simpler, faster and as taut as you want).