I recently purchased a Yubico 5 series key. And, it does what it says on-the-tin! When it comes to configuration, usually the steps are provided by the service with whom you have the account, and are as simple as plug & touch. Otherwise, Yubico does have the information and tool(s) you might need… it’s just a case of finding them, and not getting it confused with old/irrelevant information. What should have been a straightforward process to setup smart card logon with my Windows domain turned into a mission, ending in the requirement of Yubico’s PIV tool instead of Yubico’s mini-driver. A clean-up of their webpages would greatly help those searching for solutions. I understand Windows Hello makes the consumer experience much more streamlined. I haven’t tried associating my key with any of my linux VM boxes, yet. On Android, the Yubico authenticator feels obsolete, and the YubiClip app didn’t appear to work for me. But since the mobile device has its own key (for any authenticator app etc) then I would only find my Yubico NFC key useful for device boot/logon, any web account authentication (FIDO2) and, domain VPN authentication. None of these options (so far as I’m aware) are currently open on Android. Yubico cannot be accountable for slacking developers now, can they? Lol Despite the fact that these keys are NOT 100% secure, I intend to buy my entire family one for Christmas because they (can) dramatically increase your overall security. Just don’t loose your key, or be sure to have a backup!