This is a fairly nice road. Not spectacular but quite nice. It's a mountain road but it conects two cities, so sometimes can have some traffic but also has some ok places to overtake. The tarmac is pretty nice. The road has some open and fast bends but also some more tied twisties. The view is nothing to brag about, but it can be rather nice in some points if it's the 1st time you see it haha. Must do if you are doing Aveiro to Passadiços do Paiva.