Had a conversation with a couple of interns a year or so ago. They had been trying to use it for Uni. and were dissapointed in the results. Sounded like it had come quite away, however using it, you have to be fairly precise, take your time, and when your pronunciation changes it gets confused (when you are tired, sick, etc).
My physical therapist and his clinic also used it for a year. He told me they had abandoned it because it was far more trouble than it was worth. Constant issues of all kinds. Misspellings, hangups, lockups, the list went on. It was clear no one in that office wanted to see it again anytime soon.
I would love to fool with it and see how well it works these days.