I've just entered the public beta, and successfully downloaded all three components. Both AV and anti-theft installed without an issue, with root privileges. I can not, however, get backup to initialize. When asked to 'set up Google Drive' I tap that button, select my account and tap OK after which a permissions box pops titled 'Sign in to avast!Backup with Google. I tap OK and, after about three seconds of 'connecting', it comes back to the previous permissions screen. All I can do is back out and cancel, it will not proceed beyond this point.
I have an original Droid Razr with the stock android install and root. I have two factor aith enabled on my google account and this is a google apps account.