I use Dragon for work when my RSI got to bad to keep up with the masses of tickets and chats I do on a daily basis. I am extremely happy with it. It takes patience and a lot of tweaking so that it learns all of the idiosyncratic vocab you use but once it's well trained, it is surprisingly fast and easy to use. I no longer slow my speech down for it and it doesn't seem to struggle. When writing papers for my college classes, I rarely have to correct anything.

Disclaimer: this comment was written with Dragon and I only made two minor corrections because I'm quite tired and my speech isn't that great right now…