The security is always a good thing to have when dealing with money. The google authenticator is recognized to add about 99% added security to any account you use, starting from Gmail to your favorite website or exchange. I use google authenticator 2FA and so far I have not had any problem with Poloniex website.
But personally upon some upgrade from google, most of there authentication process is not just as basic as loging in on the same country. Because chances are emails have its own address depending on where you are in the globe. Because not all emails have the same authenticator espicially with 2fa that is used by google. But only hackers with great skills could decode your own but i think it just waste of time hacking an account that is just used for authorization.