Yes, I use it and I really think it has helped my wrists. I don't type much faster than I used to, but it feels much more comfortable. Another good trick is to swap your ctrl and capslock keys.
I don't have any trouble using vi with dvorak. Navigating using hjkl still makes sense.
Works best for me: making the caps be the escape key, and swapping alt and control.
I am a vim user.
Why swap alt and control: so that I can do control+whatever while pushing control with my thumb. No wrist or weird little finger streching to push the caps key.
I don't have any trouble using vi with dvorak. Navigating using hjkl still makes sense.