Very nice 3 or 4 day trail, depending on pack weight and weather conditions. The descent through the valley of Collada dels Pessons is technical full of rocks, and will slow you down.
This trail will show you different landscapes of the Pyrenees and is therefor a beautifull trail to walk. Also this area has a lot of trails, so it is easy to switch to a longer or shorter route.
A map, minimum 1:50.000, or GPS should be used. The trail goes mostly along the well signed GR 7,10 and 11 trails, but once you use the regional paths you should be aware to stay on the right track.