Maybe I didn't climb the exact line this route takes (we went pretty much straight up the face), but I found it to be spooky, sustained, steep, thin on the feet with some muscular liebacking required, funneling you to a pro-less mini-roof finish that was very thin all around and kept me gripped on TR!
With so many ginormous, hollow flakes and full-on face moves with no pro, to lead this would be very heady indeed! :-O
Carville shows another climb also on this face called "Shake it out" rated at 5.10b. I think I started on Rapid Transit by staying left of the easy flakes and right of the arete, but then headed straight up through the thinnest areas and finally through a thin roof and finger crack which I think is the end of Shake it out. I would rate that line about 5.10b. Worth doing - on top rope. Basically ditto what Aerili said.