A nice sight seeing route with some nice bends.
If you are looking to go really fast and push your bike, this is not the route for you as road is not really wide enough and although surface is pretty good its a tight mountain route as opposed to flowing bends.
A trip to the highest village in Spain. Can be quite slow going due to the number of bends (and convoys of German motorhomes!), but worth it for the scenery!
Knobblywobbly