This is my second purchase from Trust Panda. This time to buy a backup Yubikey ( 5Ci), after reading your article recommendation that a second key is advisable in case of losing the first! I am very impressed with all of the helpful articles on the Trust Panda website, and with the detailed setup instructions for my Mac , iPad and iPhone. I am a lady in my early 70's, but I love innovative technology, and follow all the latest security hints with great interest. Hence my Dashlane password manager and my Yubikeys. Just one little thing.........the clip on my new lanyard kept popping open with the slightest pull. I have had to sew it together to avoid losing it. Keep up the excellent service, your company is the face of the future.