Luckily, haven't yet used it in real life, I think that just like Faith here, I'd go mad if I did.
It's a state of mind, but not the one I want, I'll just be my very self, with my own way of talking, thank you very much.
And offcourse there is this thing where I don't really learn things by reading them, but by watching or hearing, so this isn't the place for me to improve my speech anyway.
On a whole other note: I do use five by five, or for short just five.