What? Sometimes I use Google's speech to text and a majority of the time it's a waste of my time. "Food near me" is not "fool's errand" (the irony isn't lost on me) and "gyms nearby" is not "Jim Dougherty", both are search terms I used last night.
Google Voice to Text, from my experiences, is bloody amazing for Chinese. My Chinese is abysmal (think "never gets the tone right") and for short phrases/sentences I've never had Google fail on me. Maybe it fails on larger sentences but it would be difficult for me to believe.
Japanese is another language it does very well in. I can only count on one hand how many times it has made a mistake - and usually repeating myself a tad slower and with less slurring and it will pick it up just fine.
So it might not work for everyone in the world but at some point soon it will properly be there for most national languages.
Now, interpreting the words I say is a different matter, but as far as transcription I'd say we are at basically 100% right now and have been for a while.