I haven´t done the southern half of this route in awhile so these comments are based on 191 from the dam, north.
Wow! This is a fantastic ride. The scenery is great. Some vistas bordering on spectacular. Small herd of pronghorn antelope can be spotted left and right. But the best part is the ride itself. From Dutch John to the I-80 junction, 191 is a made for riding with one sweeper leading into the next. The visibility is very good allowing you to see one, two and three curves ahead. Exhilarating! I wish I had taken some more pictures but this was so much fun we just couldn´t stop but once.