Fantastic road! I mean first part is excellent: great asphalt, great landscape and very curvy! Second part (when you are in Italy) no good at all: lot of traffic and shitty asphalt but villages there are great!
Small road with great corners and views. Runs through a small gorge beside a river with waterfalls and a lake. Top class scenery.
First part is really curvy (I mean you will never be riding straight at all), corners are completely blind and improve your cornering skills a lot.
Second part (more or less after the customs) is a little more straight, but italian drivers, cyclists and tourists make it hazardous.