This seems to be quite popular with bikers, saw quite a few on the road (different nationalities), its a more direct route from Huesca to Jaca but the road surface is pretty poor, with some gravel in areas, so beware.
I would not recommend this road, the scenery is ok, but due to poor surface and lots of corners makes progress slow and it would probably be quicker to get to Jaca, sticking on the main roads.