This line really flows. The crux is probably climbing out of the narrowing chimney into the wide hand crack. Very aesthetic. The book gives it 10b, but my partner an I found Slash to be quite a bit harder. It's all so relative at Vedauwoo.
This route is 10a in Kelman's book, which I think is accurate. Sam's description is good. The upper wide hands crack is of high quality. Well worth the walk past Reynolds hill.