Edit: I also want to note that we should have a “Security” tag for posts.
I have a few of those for probably 4, maybe 5, years now and they get the job done.
The light is a bit bright and can be annoying if you want to leave it in always.
They did have, at least in the past, some implementation issues.
(Would love to see a more updated and equally comprehensive overview like those if anyone knows.)
That is interesting, do you have experience with any other security keys?