[chedabob]

I can't think of a single compelling reason to use this over Google Authenticator.

[sowbug]

It's faster. No typing. No worry about malware stealing your OTP secret. It's easy to revoke a single device if you lose it without having to change your Authenticator secrets everywhere. And it looks cool.

[minisu]

Also, phishing and Man-in-the-Middle protection.