I've had some fun driving this back and forth, very good rendition. Still there are two things which keep me from giving 5 stars: 1) it feels too tight and there are a couple of hairpins where you hit barriers even if you're going 40 km/h in 1st gear. I find this annoying, 1 or 2 m wider would have make it much more enjoyable.
2) I don't know if this is due to app limitations but I don't like being surrounded by mountains on both sides. They obstruct the view of the landscape around halving the spectacularity.