Anyone tried the Canon EF-S 10-22mm f/3.5-4.5 USM

Has anyone tested the Canon EF-S 10-22mm f/3.5-4.5 USM on their EF mount?
It seems like this would be a no brainer compared to the Tokina 11-16mm 2.8, outside of the price and aperture.
It seems like this would be a no brainer compared to the Tokina 11-16mm 2.8, outside of the price and aperture.