I can recommend them. Have had one attached to my keychain for years and it’s still working just fine. Be advised that there’s an in-built dichotomy, in that you always need to keep a backup of your key, ideally offsite (mine is with my in-laws), but you also can’t duplicate one key to another (by its very design) … so they work best when you’re using them an a unlock for a password/passkey manager, where you just set it up once, rather than using it as a 2FA everywhere. If you go down the “I’ll employ my yubikey everywhere I can”, you’ll quickly find your backup key going out of date (thereby no longer being a backup key).