Haven't used it. It would be 127mm equivalent. Love the focal length for outdoor portraits and head shots.
The Bower/Rokinon does get excellent reviews on dyxum. But it is manual focus only.
If you don't -need- the 1.4 aperture, the Sony 85/2.8 is an excellent prime lens. About the same price, slightly slower, but with SAM autofocus. With my vision, I try to avoid manual focus.