I think it's good, at least judging from the clip of the last climb into Assisi. Some parts seemed to alternate red and white, which is remarkably pleasing to the eye. I would even argue that the aesthetic value of cobbled sections not only breaks up the monotony in your average day road surface, it also actually enhances the visuality of the tarmac because of its contrasting value.
Nonetheless, the beauty of good, old rough American tarmac is unparalleled and I am starting to wonder if these Italians actually have artisan, skilled craftsman who know how to properly lay a decent stretch of black targrout.