If you already know the Valle de Ordesa normal route to Monte Perdido, this approach to El Cilindro makes the climb entirely different. A great bivouac with no tent at Balcon de Pineta. Reaching the glacier was not evident (water was falling down the couloir making it very slippery). I had to climb in parallel and use my 30m rope to help a number of people trying to go up and down. The rest of the route went smoothly as expected. Again the rope helped to get down.
Later on I learned from a guide at Refugio Pineta that I took the wrong couloir (together with many other people!) the right and easier one is a bit more to the left.