Really addicted to mine. I have my private SSH key on there (via GPG/PGP), so that's never on my working machines. Use the standard OTP on several personally-run sites. Use U2F security for Google apps. Use the TOTP (a.k.a. Google Authenticator/Authy) app. Use the challenge-response mode as a second factor on my KeePass database. Amazing gadget.
The question regarding the teardown is... "so"? Even with full pin access to the A7005 chip, you *STILL* wouldn't have access to my GPG/SSH private key or my TOTP generators within it. That's the point of a secure element. You'd have to dissolve the casing of the A7005 chip and have a decent microscope lab to get those bits of data out of the chip. You would be able to use my U2F/OTP/TOTP-generated-code functionality. But, you could do that just by stealing my Neo and plugging it into a USB slot without any acetone bath involved.