I've just been trying the built in Mac OS dictation. So far it seems better than the Google Docs option. I'm actually using it to write this comment! I've only tried dictating fic once, but I was able to draft more words then I would have if I were typing. I will definitely have to write the sexy bits by typing, at least for now. I'm self-conscious enough just dictating. The accuracy is pretty good but I'm using default names like Rick or Steve instead of the Japanese character names which feels a little weird.