in terms of security its good however it does not sync added accounts  that means if you loose your phone and get a new one and add your google account to the phone as well as install authenticator in it  you still wont be able to log in to your origin/dropbox account because the sites will still ask for the 2 step verification code generated by the app but now your app doesnt provide with these codes.. ................... google please add the account syncing capablities.
November 10 2016