I've ridden this one at Glentress (had a fixed post at the time) and it was amazing. I'd kill for one but really can't justify it. One of my favourite frames hands down.
I've sat on this one briefly but it had clippy pedals so didn't actually get to ride it. Guess I can't really comment on it then haha. I think I'm right in saying it felt longer than the new gen sx but it was a while back.