I'm currently working on this one. I'm not an advanced player so have not tackled the bulk of his nocturnes yet. I do have 4 others in the bag and this one is maybe a bit trickier than them. (9-2, 72-1, 15-3 and Posthumous). At first I was daunted by the right hand runs against the walking left hand eighthnotes on the first and last page, but as they say, practice makes perfect, and it is getting much easier. That, really, is the only technical difficulty of the piece that I can see. The very beautiful middle movement with the right hand octaves is really quite easy and repetitive.