Narwhal Tacos on Nostr: I haven’t done this yet, but considering it for a friend with minor Bitcoin looking ...

I haven’t done this yet, but considering it for a friend with minor Bitcoin looking to self-custody.
My issue is: what do we know about how reliable a Tapsigner is over time?
And - never having worked with one - can I assume my friend can know and secure the 12 or 24 words before committing them to the Tapsigner?
Yeah, I need to just watch a video…but I’ve already typed all this, so I’m asking?