Looks amazing but I must admit the groups of cyclists would worry me - I did the Horseshoe Pass a few times last month and the cyclists trying to get up were in turns dangerous (stopping on a live carriageway to admire the view and take a photo, really?) and clogging.
I'm happy to sit back and wait but if you're impatient (or hitting triple figures on the way down like the article suggests)... Dangerous.
2015 500X Pop Star, 1.4