This line exemplifies the best of Red Slab climbing - long, steep, continuous, and reasonably protected. Start in the short left-facing corner at the right end of the roof. Clip a bolt on the outside edge (added in 2001) to mitigate a groundfall, then reach out around the roof for the second clip. Once you pull out around the roof, you get fun, continuous 5.9/5.10 slab climbing all the way to the anchors. There really isn't any distinct crux - the hardest bit will be different for everyone based on reach and body type. This is a "must-do" route - one of the nicest pitches of its kind in the canyon.
A nice route though I don't agree with Alan that it is a 3-star. The move pulling the roof at the start can go either on the right or left of the arete, left being easier on the crack up the corner. Right side I would suggest being quite stiff for 10b. The rest of the route is quite nice but I wouldn't say one of the best of its kind, seeing there really aren't any other walls like the Red Slab in the canyon. But all in all a good route. 2 stars.