Well, let's say, to 50 per cent. I did the trail from the Braunschweig hut to the Wassertalkogel, spent the night in the Rheinland-Pfalz-Biwak, enjoyed the early morning view from up there(!), and went back the same way. Thus the other and surely quite a lot more difficult other half I can't claim to know yet. It certainly was a grand hike in very good weather!