In reply to Apharri: I did it this summer, no way will you hit the ground if you fall from the crux! It's about twenty meters up, and just a few meters to the right of the main peg are a couple of massive flakes, where you can put loads of bomber wires and cams in as well as another (even worse) peg that I didn't even bother clipping. The 6b crux is properly hard, but even if you fell and the peg did break you'd just take a pretty big, but safe pendulum swing on to the gear to the right. Hope this helps.
Like I said the crux is pretty hard so let me know if you want any beta on the actual moves, and good luck!