Actually, I’ve been using it for more than 8 years now, and I work mainly out of the CLI. The benefit to me is that it stopped progression of carpel tunnel, and although I was fast before switching, I’m definitely faster now and can truly touch type, something I was unable to properly learn on Qwerty.
I won’t pretend there aren’t pain points, though, such as copy and paste. Which is why I keep Qwerty defined as a usable keyboard layout so I can easily switch with a keyboard shortcut for when I’m doing a lot of that.
Anyway, point is, the carpel tunnel thing alone made it well worth it to me.