This is exactly the kind of review I want to read for any device I'm thinking about buying! Grumpy, yes, but with reason. It explains clearly what the expectations were and how the Yubikey (and Yubico app) failed. If Yubico wants to do better, this review gives them the roadmap. I hope we will see another device review now that the NFC FIDO2 authenticator from SoloKeys.com is a reality. Like many kickstarters, it delivered late. But, if the blog is to be believed, in this case it was because SoloKeys were taking the time to get things right. I'm curious if they did get it right. Can a small project that is aimed at individual users -- not huge, institution-wide deployments -- make @edent less grumpy?