I am using their FIDO 2 USB-Keys for 2FA. First I was sceptical too, but they are on the market for quite a while and I like their fully FOSS approach which Yub

I am using their FIDO 2 USB-Keys for 2FA. First I was sceptical too, but they are on the market for quite a while and I like their fully FOSS approach which Yubikey does not provide. Some of their products seem a bit overpriced, because you can do everything by yourself, but if I count all the hours and days spent with unlocking Bootloaders, searching ROMs and debugging them, this offer seems worth the price.