I went only from Davos to crossroad to Albula Pass. It´s nice, but not so spectacular as passes around
This is one of the very best routes if you like a lot of turns. Tons and tons, many nice and flowing from one corner into the next and next... Almost never ending in some cases. Beautiful little towns, very historic.
A nice selection of sweepers, mostly good surface and a pleasant surrounding, who could ask for more? :-)